{ Eth″moid (?), Eth‐moid″al (?), } a. [Gr. � like a sieve; � sieve + � from: cf. F. ethmoïde, ethmoïdal.] (Anat.) (a) Like a sieve; cribriform. (b) Pertaining to, or in the region of, the ethmoid bone.
Ethmoid bone(Anat.), a bone of complicated structure through which the olfactory nerves pass out of the cranium and over which they are largely distributed.