tīˈtilə, tə̇ˈt- noun
( plural titil·lae tīˈti(ˌ)lē; tə̇ˈti(ˌ)lē, -ˌlī)
Etymology: New Latin, from Latin titillare to tickle
: any of various processes on the external genitalia of male invertebrate animals believed to play a role in sexual activities