n.
Variant: or fon · ta · nelle
Pronunciation: ˌ fän-t ə - ' nel, ' fän-t ə - 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