fontanel fon·ta·nel uncommon noun 1. any membranous gap between the bones of the cranium in an infant or fetus Synonymsfontanellesoft spot Related words Word family fontanelle Broader terms orifice Narrower terms anterior fontanellesphenoid fontanelle Parts craniumchild's body WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
