part of part of develops from contributes to morphology of ethmoid bone VHOG:0001317 MESH:D005004 Wikipedia:Ethmoid_bone os ethmoidale MA:0001483 UBERON:0001679 FMA:52740 ethmoidal bone A bone in the skull that separates the nasal cavity from the brain. As such, it is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction. The ethmoid bone is one of the bones that makes up the orbit of the eye[WP]. BTO:0004140 GAID:212 NCIT:C12711 SCTID:272674006 ethmoid EMAPA:19018 endochondral bone basicranium facial bone ethmoid bone primordium facial skeleton neurocranium bone ethmoid region