Definition of "Inversion" :

noun: the act of turning inside out

noun: turning upside down; setting on end

noun: a term formerly used to mean taking on the gender role of the opposite sex

noun: (counterpoint) a variation of a melody or part in which ascending intervals are replaced by descending intervals and vice versa

noun: the reversal of the normal order of words

noun: (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed

noun: the layer of air near the earth is cooler than an overlying layer

noun: a chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa

noun: 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)