inverse

(ĭn-vûrsˈ, ĭnˈvûrsˌ)

1. Reversed in order, nature, or effect.
2. Mathematics Of or relating to an inverse or an inverse function.
3. Archaic Turned upside down; inverted.

1. Something that is opposite, as in sequence or character; the reverse.
2. Mathematics One of a pair of elements in a set whose result under the operation of the set is the identity element, especially:
   a. The reciprocal of a designated quantity. Also called multiplicative inverse.
   b. The negative of a designated quantity. Also called additive inverse.

Related Forms:

• in·verseˈly adverb