Answer: fontanelles

AnswerCrossword Clue
fontanellesA space between the bones of the skull in an infant or fetus, where ossification is not complete and the sutures not fully formed. The main one is between the frontal and parietal bones
fontanellesFONTANELLE, a membrane-covered gap between the immature parietal bones in the skull of a foetus or infant also FONTANEL