inversion

Concise Oxford English Dictionary © 2008 Oxford University Press:
inversion/ɪnˈvɜːʃn/

▶noun

• 1 the action of inverting or the state of being inverted.

  ■ reversal of the normal order of words, typically for rhetorical effect.

• 2 Music an inverted interval, chord, or phrase.

• 3 (also temperature or thermal inversion) a reversal of the normal decrease of air temperature with altitude, or of water temperature with depth.

• 4 Mathematics the process of finding an inverse or reciprocal quantity from a given one.

• 5 Chemistry a reaction causing a change from one optically active configuration to the opposite configuration.

• 6 (also sexual inversion) Psychology, dated homosexuality.

– derivatives
inversive adjective.