I. -ˌsīn, -_sə̇n adjective
Etymology: Latin formicinus, from formica ant + -inus -ine
1. : of, relating to, or resembling an ant
2.
[New Latin Formicinae group of ants, from Latin, feminine plural of formicinus ]
: belonging to a group of ants that resemble and are closely related to those of the genus Formica
II. noun
( -s )
: a formicine ant