Screw
A Translation along a straight line 
and a Rotation about such that the angle of Rotation isproportional to the Translation at each instant. Also known as a Twist.
- Nilpotent Matrix
- Nim
- Nim-Heap
- Nim-Sum
- Nim-Value
- n-in-a-Row
- Nine-Point Center
- Nine-Point Circle
- Nine-Point Conic
- Nint
- Nint Zeta Function
- Nirenberg's Conjecture
- Niven Number
- Niven's Constant
- n-minex
- Nobbs Points
- Noble Number
- Node (Algebraic Curve)
- Node (Fixed Point)
- Node (Graph)
- Noetherian Module
- Noetherian Ring
- Noether-Lasker Theorem
- Noether's Fundamental Theorem
- Noether's Transformation Theorem