Meaning

adjective of or related to the anus

adjective a stage in psychosexual development when the child's interest is concentrated on the anal region; fixation at this stage is said to result in orderliness, meanness, stubbornness, compulsiveness, etc.

originBorrowed from Latin ānālis. By surface analysis, anus + -al. Psychological sense shortened from anal-retentive.

Etymology from Wiktionary, CC BY-SA 3.0