ethmoidyoudaoicibaDictYouDict[ethmoid 词源字典]
"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", Mid 18th century: from Greek ēthmoeidēs, from ēthmos 'a sieve'.[ethmoid etymology, ethmoid origin, 英语词源]