Meaning

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

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)

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

originFrom Latin inversiōnem.

Etymology from Wiktionary, CC BY-SA 3.0