Etymology
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inversion (n.)

1550s, "act of inverting;" 1590s, "state of being inverted," from Latin inversionem (nominative inversio) "an inversion," noun of action from past participle stem of invertere "turn about, turn upside-down" (see invert). Meteorological sense is from 1902. In old psychology, "homosexuality" (1895, short for sexual inversion) but in later psychology "identification with the opposite sex" (1958).

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Definitions of inversion

inversion (n.)
the layer of air near the earth is cooler than an overlying layer;
inversion (n.)
abnormal condition in which an organ is turned inward or inside out (as when the upper part of the uterus is pulled into the cervical canal after childbirth);
inversion (n.)
a chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa;
inversion (n.)
(genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed;
inversion (n.)
the reversal of the normal order of words;
Synonyms: anastrophe
inversion (n.)
(counterpoint) a variation of a melody or part in which ascending intervals are replaced by descending intervals and vice versa;
inversion (n.)
a term formerly used to mean taking on the gender role of the opposite sex;
Synonyms: sexual inversion
inversion (n.)
turning upside down; setting on end;
Synonyms: upending
inversion (n.)
the act of turning inside out;
Synonyms: eversion / everting
From wordnet.princeton.edu