inversion inversion /ˌɪnˈvɝːʒən/

noun

1. () The layer of air near the earth is cooler than an overlying layer  ( inversion )
   the layer of air near the earth is cooler than an overlying layer
   
2. The act of turning inside out  ( eversion , everting , inversion )
   the act of turning inside out
   
3. Turning upside down; setting on end  ( inversion , upending )
   turning upside down; setting on end
   
4. A term formerly used to mean taking on the gender role of the opposite sex  ( inversion , sexual inversion )
   a term formerly used to mean taking on the gender role of the opposite sex
   
5. (counterpoint) a variation of a melody or part in which ascending intervals are replaced by descending intervals and vice versa  ( inversion )
   (counterpoint) a variation of a melody or part in which ascending intervals are replaced by descending intervals and vice versa
   
6. The reversal of the normal order of words  ( anastrophe , inversion )
   the reversal of the normal order of words
   
7. (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed  ( inversion )
   (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed
   
8. A chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa  ( inversion )
   a chemical process in which the direction of optical rotation of a substance is reversed from dextrorotatory to levorotary or vice versa
   
9. 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 )
   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)