# Words That Start With U

Undefined, Union, Unit

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## List Of Words That Start With U

These are our Math Dictionary words that start with U.

Ok. There are not very many terms in this list, yet do you see these U words in your math glossary?

Math Words That Start With U: Math Dictionary below the U words.
**U.S. Customary System** - a system of measurement used almost exclusively in the United States of America. (teaspoon, tablespoon, ounce, cup, pint, quart, gallon; inch, foot, yard, mile; ounce, pound, ton)

**Undefined** - if the denominator of a fraction is 0, then the fraction is undefined.

**Undefined Slope** - vertical lines that have slopes that are called undefined.

**Unilateral Surface** - a surface with only one side, such as a Moebius strip.

**Unimodal** - a finite sequence is unimodal if it first increases and then decreases.

**Unimodular** - a square matrix is unimodular if its determinant is 1.

**Union of Sets** - the set of all the objects contained by at least one of the sets. The symbol for union is U.

**Unit** - a single thing used as a standard or measure.

**Unit Circle** - a unit circle is a circle with radius 1, circle of radius 1 centered at the origin (0,0) of the Cartesian coordinate system.

**Unit Cube** - a cube with edge length 1.

**Unit Fraction** - a fraction whose numerator is 1.

**Unit Square** - a unit square is a square of side length 1.

**Unitary Divisor** - a divisor d of c is called unitary if gcd(d,c/d) = 1.

**Units column** - the first column of numbers to the left of the decimal point.

**Unity** - one

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