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Definition of Lacrimal bone
1. Noun. Small fragile bone making up part of the front inner walls of each eye socket and providing room for the passage of the lacrimal ducts.
Medical Definition of Lacrimal bone
1. An irregularly rectangular thin plate, forming part of the medial wall of the orbit behind the frontal process of the maxilla; it articulates with the inferior nasal concha, ethmoid, frontal, and maxillary bones. Synonym: os lacrimale, os unguis. (05 Mar 2000)