noun ethmoid A square bone at the root of the nose, forming part of the cranium, and having many perforations through which the olfactory nerves pass to the nose. 1
adjective ethmoid denoting or relating to a bone of the skull that forms part of the eye socket and the nasal cavity 0
noun ethmoid the ethmoid bone 0
adjective ethmoid designating or of the perforated bone or bones that form part of the septum and walls of the nasal cavity: the olfactory nerves pass through the perforations 0
