1.(Med.) An issue or artificial ulcer for the discharge of humors from the body.(Obs.)
2.(Anat.) 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.
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