ethmoid

English Thesaurus

1. one of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity (noun.body)

hypernym	:	bone, os,
definition	:	rigid connective tissue that makes up the skeleton of vertebrates (noun.body)

part meronym	:	braincase, brainpan, cranium,
definition	:	the part of the skull that encloses the brain (noun.body)