Are you looking for some math words that start with the letter D? Look no further, you have come to the right place.

In this article, I’m going to embark on a journey into the realm of math words that start with the letter D. From algebraic equations to awe-inspiring angles, these words hold the key to unlocking the beauty and complexity of the numerical world.

So, without any further ado, let’s dive into the captivating world of “Math Words That Start With D” and discover the beauty and relevance of arithmetic in our lives.

**Math Words That Start With D**

The followings are the math words that begin with the letter D (In alphabetical order):

**1. Data:** In mathematics, “data” refers to information or facts that are collected and used for analysis or calculation. Data can be quantitative, such as numbers and measurements, or qualitative, such as descriptions and categories.

**2. Data Analysis:** “Data analysis” is the process of examining, cleaning, and interpreting data to discover useful information, patterns, or trends.

**3. Data Point:** A “data point” is a single value or observation within a data set. It is represented by a dot on a graph or chart.

**4. Date:** A “date” is a specific point in time, usually represented in numerical format, such as day/month/year.

**5. Day:** A “day” is a unit of time, equal to 24 hours, used to measure the time between two sunrises or sunsets.

**6. Debit:** In accounting, “debit” is the recording of an entry on the left side of a ledger, indicating an increase in assets or a decrease in liabilities.

**7. Debt:** “Debt” refers to the amount of money owed by one party to another.

**8. Decade:** A “decade” is a period of ten years.

**9. Decagon:** A “decagon” is a polygon with ten sides and ten angles.

**10. Decagonal Prism:** A “decagonal prism” is a three-dimensional shape with ten faces, all of which are parallelograms.

**11. Decahedron:** A “decahedron” is a polyhedron with ten faces.

**12. Decimal:** A “decimal” is a numerical representation of a real number using a decimal point to separate the whole number part from the fractional part.

**13. Decimal Fraction:** A “decimal fraction” is a fraction with a denominator of 10, 100, 1000, or any power of 10.

**14. Decimal Number:** A “decimal number” is any number that includes a decimal point.

**15. Decimal Point:** The “decimal point” is a dot used to separate the whole number part from the fractional part in a decimal representation.

**16. Decimal Representation of Rational Numbers:** Rational numbers can be expressed as decimals, either terminating or repeating.

**17. Decimeter:** A “decimeter” is a unit of length equal to one-tenth of a meter.

**18. Decompose:** In mathematics, “decompose” means to break down a number, expression, or shape into its constituent parts or simpler forms.

**19. Decompose:** In mathematics, “decompose” means to break down a number, expression, or shape into its constituent parts or simpler forms.

**20. Decomposing Fractions:** “Decomposing fractions” involves breaking a fraction down into a sum of smaller fractions with simpler denominators.

**21. Decrease:** “Decrease” means to make something smaller or reduce in value.

**22. Deduct:** “Deduct” means to subtract or take away from a total.

**23. Deductible:** In finance, “deductible” is the amount that an insured individual must pay before an insurance company covers the remaining cost.

**24. Definite Integral:** The “definite integral” is the limit of a sum that represents the accumulation of the area under a curve between two specific points on the x-axis.

**25. Degenerate:** In geometry, a “degenerate” shape is a shape that has collapsed to a lower-dimensional figure or has lost its distinctiveness.

**26. Degree:** “Degree” is a unit of measurement for angles, where one full revolution around a circle is 360 degrees.

**27. Degree Angle Measure:** The “degree angle measure” represents the magnitude of an angle in degrees.

**28. Degree Disk:** A “degree disk” is a circular tool used to measure angles in degrees.

**29. Dekameter:** A “dekameter” is a unit of length equal to ten meters.

**30. Del Operator:** In vector calculus, the “del operator” is a vector operator that represents the gradient, divergence, and curl of a vector field.

**31. Delta:** “Delta” is the fourth letter of the Greek alphabet and is commonly used to denote change or difference in mathematics.

**32. Denominator:** In a fraction, the “denominator” is the number below the fraction bar, representing the total number of equal parts into which the whole is divided.

**33. Density:** “Density” refers to the mass per unit volume of a substance and is commonly denoted by the symbol “ρ” (rho).

**34. Dependent Event:** In probability, “dependent events” are events whose outcomes are influenced by previous events.

**35. Dependent Variable:** In a mathematical equation or relation, the “dependent variable” is the one whose value depends on the value of the independent variable.

**36. Deposit:** A “deposit” is a sum of money placed in a bank or financial institution for safekeeping or to earn interest.

**37. Depth:** “Depth” refers to the distance from the top or surface of an object to its bottom or the farthest point.

**38. Derivative:** The “derivative” of a function measures the rate at which the function changes with respect to its input.

**39. Descending Order:** In mathematics, “descending order” is the arrangement of numbers or elements from largest to smallest.

**40. Determinant:** In linear algebra, the “determinant” is a scalar value that can be calculated from a square matrix.

**41. Deviation:** In statistics, “deviation” measures the distance between data points and a central value, such as the mean or median.

**42. Diagonal:** A “diagonal” is a line segment that connects two non-adjacent vertices of a polygon.

**43. Diagonal of a Rectangle:** The “diagonal of a rectangle” is the line segment that connects opposite corners of the rectangle.

**44. Diagonal of a Square:** The “diagonal of a square” is the line segment that connects opposite corners of the square.

**45. Diagonals of Parallelogram:** The “diagonals of a parallelogram” are the line segments that connect opposite corners of the parallelogram.

**46. Diagram:** A “diagram” is a visual representation of data, information, or relationships using charts, graphs, or drawings.

**47. Diameter:** The “diameter” of a circle is the line segment that passes through the center of the circle and connects two points on its circumference.

**48. Diamond:** In geometry, a “diamond” is a quadrilateral with two pairs of equal adjacent sides.

**49. Dice:** “Dice” are small cubes with each face numbered from 1 to 6, used in games of chance and probability experiments.

**50. Die:** A “die” is a singular form of dice, typically used in board games and other gaming activities.

**51. Difference:** “Difference” is the result of subtracting one number or quantity from another.

**52. Difference of Squares:** In algebra, the “difference of squares” refers to the factorization of a binomial expression in the form a^2 – b^2.

**53. Difference Quotient:** The “difference quotient” is a mathematical expression used to find the average rate of change of a function over a specific interval.

**54. Differential Equation:** A “differential equation” is an equation that relates a function and its derivatives.

**55. Differentiation:** “Differentiation” is the process of finding the derivative of a function with respect to its variable.

**56. Digit:** A “digit” is a single numerical symbol used to represent numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, or 9).

**57. Digital:** “Digital” refers to information or data that is represented using discrete values or digits.

**58. Digital Clock:** A “digital clock” displays the time using digits or numbers rather than traditional clock hands.

**59. Digital Root:** The “digital root” of a number is the single-digit obtained by repeatedly summing the digits of the number until a single digit remains.

**60. Dilation:** In geometry, “dilation” is a transformation that enlarges or reduces a figure by a scale factor.

**61. Dime:** A “dime” is a coin with a value of ten cents.

**62. Dimension:** In geometry, “dimension” refers to the measure of the size or extent of a geometric object in a particular direction.

**63. Dimensions:** “Dimensions” represent the number of coordinates needed to specify a point in space.

**64. Dipyramid:** A “dipyramid” is a polyhedron with two congruent polygonal faces and two congruent polygonal bases.

**65. Directed Number:** A “directed number” is a number that can be positive or negative, representing quantities with direction and magnitude.

**66. Direction:** “Direction” refers to the line or path along which an object moves or the orientation of an angle.

**67. Directrix:** In geometry, the “directrix” is a fixed line used to define a parabola or hyperbola.

**68. Discount:** A “discount” is a reduction in the price or value of an item or service.

**69. Discrete Data:** “Discrete data” is data that can only take on specific, separate values and not any value within a range.

**70. Discriminant:** In algebra, the “discriminant” is a term used to determine the nature of the roots of a quadratic equation.

**71. Disk:** In geometry, a “disk” is a two-dimensional shape that includes all the points within a circle.

**72. Displacement:** “Displacement” refers to the change in position or the distance and direction between two points.

**73. Distance:** “Distance” is the length of the path between two points, measured in units such as meters or kilometers.

**74. Distributive Law:** The “distributive law” states that multiplication distributes over addition, expressed as a(b + c) = ab + ac.

**75. Distributive Property:** The “distributive property” states that multiplication distributes over addition and subtraction in algebraic expressions.

**76. Diverge:** In calculus, a series “diverges” if its terms do not approach a specific limit as the series progresses.

**77. Diversification:** In finance, “diversification” is the strategy of spreading investments across various assets to reduce risk.

**78. Divide:** “Divide” means to separate a quantity into equal parts.

**79. Divide Evenly:** To “divide evenly” means to divide a quantity into equal parts without any remainder.

**80. Dividends:** “Dividends” are payments made by corporations to their shareholders from their profits.

**81. Dividing Decimals:** “Dividing decimals” involves the division of numbers with one or more decimal places.

**82. Dividing Fractions:** “Dividing fractions” is the process of finding the quotient of two fractions.

**83. Divisibility:** “Divisibility” is the property of a number being evenly divisible by another number without leaving a remainder.

**84. Divisible:** A number is “divisible” by another number if it can be divided by that number without leaving a remainder.

**85. Division:** “Division” is an arithmetic operation that involves splitting a quantity into equal parts.

**86. Division by Zero:** Division by zero is undefined in mathematics and not allowed because it leads to infinity or an undefined result.

**87. Divisor:** In a division operation, the “divisor” is the number by which another number is divided.

**88. Dodecagon:** A “dodecagon” is a polygon with twelve sides and twelve angles.

**89. Dodecahedron:** A “dodecahedron” is a polyhedron with twelve faces.

**90. Dollar:** “Dollar” is the official currency of several countries, including the United States.

**91. Domain:** In the context of functions, the “domain” is the set of all possible input values or independent variables.

**92. Dot Plot:** A “dot plot” is a graphical representation of data using dots to display individual data points.

**93. Dot Product:** The “dot product” is a mathematical operation that calculates the scalar product of two vectors.

**94. Double:** “Double” means to multiply a number or quantity by 2.

**95. Double Root:** In algebra, a “double root” or “repeated root” is a solution to an equation that appears twice.

**96. Doubles:** In probability, “doubles” refers to the outcome of rolling a pair of dice and obtaining the same number on both dice.

**97. Dozen:** A “dozen” is a quantity equal to 12.

**98. Duodecimal:** The “duodecimal” system is a base-12 numeral system that uses the digits 0-9 and two additional symbols, usually represented as “A” and “B.”

I hope you found this article “Math Words That Start With D” helpful and informative.

Also, keep in mind that, this isn’t an exhaustive list, if there are any math words starting with the letter D.

Feel free to leave a comment below with the missing math word and I’ll update the list as soon as possible.

And, if you’d like to explore more math words starting with different letters of the alphabet, click the link below:

- Math Words That Start With E
- Math Words That Start With F
- Math Words That Start With G
- Math Words That Start With H