What is the meaning of inversion?

noun

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