WordReference Random House Unabridged Dictionary of American English © 2026
for•mi•ca•tion
(fôr′mi kā′shən),USA pronunciation n.
- Psychiatry, Drugsa tactile hallucination involving the belief that something is crawling on the body or under the skin.
- Latin (Pliny) formīcātiōn-, stem of formīcātiō a sensation that ants are crawling on one's skin, equivalent. to formicā(re) to have such a sensation (verb, verbal derivative of formīca ant) + -tiōn- -tion
- 1700–10