protoconidn.

Brit.

/ˌprəʊtə(ʊ)ˈkəʊnɪd/, U.S.

/ˌproʊdəˈkoʊnɪd/

Origin: Formed within English, by derivation. Etymons: protocone n., -id suffix⁴.

Etymology: < protocone n. + -id suffix⁴; so named as representing the apex of the primitive conical reptilian tooth. Compare hypoconid n., metaconid n., and paraconid n.

Zoology.

A cusp on the anterior buccal corner of a mammalian lower molar tooth.

ΘΚΠ

the world > animals > mammals > [noun] > parts of > (parts of) teeth

heel1833

metacone1888

metaconid1888

metaconule1888

paracone1888

paraconid1888

protocone1888

protoconid1888

protoconule1888

mesostyle1892

talonid1897

1888 H. F. Osborn in Amer. Naturalist 22 1072 (table) Terms proposed... Protoconid... Terms now in use... Antero-external cusp.

1896 Proc. Zool. Soc. 568 In the lower molar [of Gymnura] the protoconid evidently develops fast.

1933 A. S. Romer Vertebr. Paleontol. xii. 248 The lower teeth tend also to square up..so that the four definitive cusps are the protoconid, metaconid, entoconid, and hypoconid.

1988 Nature 14 Apr. 639/1 P₃ with high lingually situated protoconid and a deep talonid that separates the protoconid from the posterior cusps.

2002 D. R. Swindler Primate Dentition i. 8 The lower molar has a trigonid..consisting of the paraconid, metaconid and protoconid.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	protoconid
释义	protoconidn. Brit. /ˌprəʊtə(ʊ)ˈkəʊnɪd/, U.S. /ˌproʊdəˈkoʊnɪd/ Origin: Formed within English, by derivation. Etymons: protocone n., -id suffix⁴. Etymology: < protocone n. + -id suffix⁴; so named as representing the apex of the primitive conical reptilian tooth. Compare hypoconid n., metaconid n., and paraconid n. Zoology. A cusp on the anterior buccal corner of a mammalian lower molar tooth. ΘΚΠ the world > animals > mammals > [noun] > parts of > (parts of) teeth heel1833 metacone1888 metaconid1888 metaconule1888 paracone1888 paraconid1888 protocone1888 protoconid1888 protoconule1888 mesostyle1892 talonid1897 1888 H. F. Osborn in Amer. Naturalist 22 1072 (table) Terms proposed... Protoconid... Terms now in use... Antero-external cusp. 1896 Proc. Zool. Soc. 568 In the lower molar [of Gymnura] the protoconid evidently develops fast. 1933 A. S. Romer Vertebr. Paleontol. xii. 248 The lower teeth tend also to square up..so that the four definitive cusps are the protoconid, metaconid, entoconid, and hypoconid. 1988 Nature 14 Apr. 639/1 P₃ with high lingually situated protoconid and a deep talonid that separates the protoconid from the posterior cusps. 2002 D. R. Swindler Primate Dentition i. 8 The lower molar has a trigonid..consisting of the paraconid, metaconid and protoconid. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1888
随便看	wrystroke wrytail wrythening wrytoothed ws wspu wsw wta wtf wu wu tsai wu-wei wuddies wuddy wudu wufan wuff wuffer wuffler wugg wuk wulder wulfenite wulfenites wulfilian