Main Entry: ethmoid bone Function: noun : a light spongy cubical bone of the skull that is made up of thin plates and forms much of the walls of the nasal cavity and partof those of the orbits
ethmoid bonen. A light spongy bone located between the eye sockets, forming part of the walls and septum of the superior nasal cavity, and containing perforations for the passage of olfactory nerve fibers.
