mesethmoidn.adj.
/mɛsˈɛθmɔɪd/, /mɛzˈɛθmɔɪd/, U.S. /mɛzˈɛθˌmɔɪd/, /mɛsˈɛθˌmɔɪd/ Zoology.
A. n.
The ethmoid bone; (also) the cartilage from which this develops.
ΘΚΠ
the world > life > the body > structural parts > bone or bones > skull > parts of skull > [noun] > bones of nose
sieve-bone1594
ethmoid bone1657
labyrinth1678
vomer1704
ethmoid1732
turbinal1848
ethmoturbinal1853
mesethmoid1870
turbinate1873
mid-ethmoid1884
1870 W. H. Flower Introd. Osteol. Mammalia xi. 179 (caption) A section of the cranium of a very young African Elephant..taken somewhat to the right of the middle line, so that the mesethmoid and vomer are removed.
1899 Proc. Zool. Soc. 395 The mesethmoid is a vertical linguiform plate resting upon the distal end of the parasphenoid below and underlying the nasals above.
1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xv. 416 On the inner side it [sc. the orbit] is separated from the orbit of the other side by the inter-orbital septum, a thin vertical plate of bone, formed by the coalescence of the pre-sphenoid and orbit-sphenoid behind, and the mesethmoid in front and above.
1986 A. S. Romer & T. S. Parsons Vertebr. Body (ed. 6) viii. 260 The mesethmoid..ossifies in this area and extends forward as a median septum between the two nasal cavities.
B. adj.
Of, relating to, or of the nature of the ethmoid bone.
ΘΚΠ
the world > life > the body > structural parts > bone or bones > skull > parts of skull > [adjective] > front of skull > frontal bone
crownal1553
ethmoidal1697
ethmoid1726
postfrontal1840
prefrontal1851
interfrontal1855
mesethmoid1875
1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 193 The Olfactory organs are two wide sacs which occupy all the space between the mesethmoid cartilage, the antorbital processes, and the premaxillæ and maxillæ.
1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xiv. 381 Notice the cartilaginous mesethmoid plate separating the right from the left nasal cavity.
1988 Copeia iv. 866 Confusion over homology and identification of mesethmoid ossifications has led to a variety of terms for the two discs: dorsal and ventral mesethmoid, supraethmoid and mesethmoid, and supraethmoid and hypoethmoid.
Derivatives
mesethˈmoidal adj.
ΚΠ
1874 T. H. Huxley On Struct. of Skull 197 The internasal or mesethmoidal cartilage.
1881 Philos. Trans. (Royal Soc.) 172 104 In their interspace below there is between these two ecto-ethmoids an evident, endosteal, ‘mesethmoidal’ tract.
1923 Philos. Trans. (Royal Soc.) B. 211 217 The rostral cartilage, a cartilage of nasal (mesethmoidal) origin.
1998 Ann. Anat. 180 45 Mesethmoidal cartilage differentiation was variably deficient in all three holoprosencephalic cases.
This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).
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n.adj.1870