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Math Glossary Letter Z
z score
noun
the number of standard deviations from the mean a data point is. Also known as a standard score
z table
noun
The table of probabilities assigned to a z-score
z-intercept
noun
A point at which a graph intersects the z-axis.
zero
noun
A number with no size or quantity. Neither positive or negative.

0
zero coupon bond
noun
A bond where the face value is paid at the time of maturity. No coupons are paid.
zero matrix
noun
A matrix for which all elements are equal to 0.
zero multiplication property
noun
The product of any number and zero is zero

A * 0 = 0
zero of a function
noun
A value of x which makes a function equal to 0. Note: A zero may be real or complex.
zero slope
noun
The slope of a horizontal line. A horizontal line has slope 0 because all its points have the same y-coordinate.
zero vector
noun
A vector with magnitude (length) zero.
zeta
noun
A letter of the greek alphabet used for math notation.

Ζ  ζ
zodiac sign
noun
an area of the sky that extends approximately 8° north or south of the ecliptic, the apparent path of the Sun across the celestial sphere over the course of the year