
Lattice Point
A point with x and ycoordinates that are both integers. These are often the points on a graph where the grid lines cross (assuming the lines are every 1 unit).
Quadrantal Angle
Any angle with a measure that is a multiple of 90°.
Oblique Angle
Any angle that is not 90° or a multiple of 90°. That is, any angle that is not quadrantal.
Oblique Triangle
Any triangle that is not a right triangle.
Reflex Angle
Any angle with a measure greater than 180°.
Minuend
In subtraction, the number from which you are subtracting. For example, in 10  4, the minuend is 10.
Subtrahend
In subtraction, the number that you are subtracting. For example, in 10  4, the subtrahend is 4.
Addend
One of the numbers in an addition problem. For example, in 5 + 6, both 5 and 6 are addends.
Radicand
The part under the radical sign, as in a square root or any root.
Operand
A general term for the input to a function. For example, in sin (x+1), the operand is x+1
Solidus
The line between the numerator and denominator in division. IE the "slash" in 5/8.
Vinculum
The line over repeating decimals. More generally, a line over a few things to indicate that they are linked in some way, such as when naming line segments, or when negating a logical expression.

