Fontanel
Pronunciation : Fon"ta*nel`
Part of Speech : n.
Etymology : [F. fontanelle, prop., a little fountain, fr. fontaine fountain. See Fountain.]
Definition : 1. (Med.)
Defn: An issue or artificial ulcer for the discharge of humors from the body.[Obs.] Wiseman.
2. (Anat.)
Defn: One of the membranous intervals between the incompleted angles of the parietal and neighboring bones of a fetal or young skull; -- so called because it exhibits a rhythmical pulsation.
Note: In the human fetus there are six fontanels, of which the anterior, or bregmatic, situated at the junction of the coronal and sagittal sutures, is much the largest, and remains open a considerable time after birth.
Source : Webster's Unabridged Dictionary, 1913