| Ethmoid bone | |
|---|---|
 Ethmoid inside the orbit (brown) | |
 Animation of the ethmoid bone | |
| Details | |
| Identifiers | |
| Latin | os ethmoidale |
| MeSH | D005004 |
| TA98 | A02.1.07.001 |
| TA2 | 721 |
| FMA | 52740 |
| Anatomical terms of bone | |
The ethmoid bone (/ˈɛθmɔɪd/;[1][2] from Ancient Greek: ἡθμός, romanized: hēthmós, lit. 'sieve') is an unpaired bone in the skull that separates the nasal cavity from the brain. 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 make up the orbit of the eye.
- ^ OED 2nd edition, 1989 as /ˈεθmɔɪd/.
- ^ Entry "ethmoid" in Merriam-Webster Online Dictionary.