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The Collaborative International Dictionary
Premaxillae

Premaxilla \Pre"max*il"la\, n.; pl. Premaxill[ae]. [NL. See Pre-, and Maxilla.] (Anat.) A bone on either side of the middle line between the nose and mouth, forming the anterior part of each half of the upper jawbone; the intermaxilla. In man the premaxill[ae] become united and form the incisor part of the maxillary bone.

Wiktionary
premaxillae

n. (plural of premaxilla English)

WordNet
premaxillae