Ok. There aren’t a lot of terms on this list, however do you notice these U-words in your math dictionary?

U.S. Customary System is an instrument of measurement that is mostly used within 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 equals zero, the fraction is not defined.
• undefined Slope Vertical lines that have slopes which are referred to as undefined.
• Unilateral Surface A surface that has just one edge, like the Moebius strip.
• Unimodal A finite sequence can be described as unimodal if it initially increases, before decreasing.
• Unimodular A square matrix is considered unimodular when its determinant is 1.
• Union of Sets is the set of all the objects in at minimum one of the sets. Union is represented by the symbol U.
• Unit – one thing that is used as a measure or measurement.
• Unit Circle A unit circle is defined as a that has a radius of 1, and a circle with a radius of 1 and centered at the center (0,0) from the Cartesian coordinate system.
• Cube Cube – A cube that has an edge length 1.
• Unit Fraction is a fraction with a numerator of 1.
• Unit Square A unit is square with length 1 side.
• unitary divisor A divisor d of c can be described as unitary when gcd(d,c/d) is 1.
• Column of Units The number column that is the first just to the right.
• Unity – one