ˌ ̷ ̷ ̷ ̷ˈkāshən noun
( -s )
Etymology: Latin formication-, formicatio, from formicatus (past participle of formicare to crawl like an ant, from formica ant) + -ion-, -io -ion — more at pismire
: an abnormal sensation resembling that made by insects creeping in or on the skin