formicate

verb (intr) rare

to crawl around like ants
to swarm with ants or other crawling things

Word Origin for formicate

C17: from Latin formīcāre, from formīca ant

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012