[en-too-puh l, -tyoo-, -tuhp-uh l; en-too-puh l, -tyoo-] /ɛnˈtu pəl, -ˈtyu-, -ˈtʌp əl; ˈɛn tʊ pəl, -tyʊ-/
a set of n objects or quantities, where n is an integer, especially such a set arranged in a specified order (ordered n-tuple)
(logic, maths) an ordered set of n elements
now that you mention it
adjective 1. (of a semiconductor) having more conduction electrons than mobile holes 2. associated with or resulting from the movement of electrons in a semiconductor: n-type conductivity N-type Made of material, usually a semiconductor such as silicon, that has been doped with impurities so that it has an excess of conductive electrons. Compare P-type.