Main Entry: fon·ta·nel

Variant(s): or fon·ta·nelle \ˌfän-tə-ˈnel, ˈfän-tə-ˌ\

Function: noun

Etymology: Middle English fontinelle a bodily hollow or pit, from Anglo-French funtainele, diminutive of funtaine fountain

Date: 1741

: a membrane-covered opening in bone or between bones; specifically : any of the spaces closed by membranous structures between the uncompleted angles of the parietal bones and the neighboring bones of a fetal or young skull