hypoconen.
/ˈhʌɪpəʊkəʊn/ Zoology.
An external cusp on the inner back corner of a mammalian upper molar tooth.
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the world > life > the body > digestive or excretive organs > digestive organs > mouth > substance or parts of teeth > [noun] > crown and parts
mensa1684
crown1733
cusp1849
face1872
hypocone1888
hypoconid1888
tritocone1896
hypoconulid1897
talon1898
1888 H. F. Osborn in Amer. Naturalist 22 1072 The first ‘secondary’ cusps (hypocone—hypoconid), added to the upper and lower molars of the primitive triangle, modify the crown from a triangular to a quadrangular shape.
1891 W. H. Flower & R. Lydekker Introd. Study Mammals ii. §2. 33 Finally, in the bunodont series, the addition of a postero-internal cusp, termed the hypocone, forms the sex~tubercular molar.
1933 A. S. Romer Vertebr. Paleontol. xii. 248 In the upper molars the tooth tends to square itself up usually by the additiion of a fourth cusp, the hypocone, at the inner back corner.
1968 R. Zangerl tr. B. Peyer Compar. Odontol. 187 In the upper jaw a talon formed in that a second lingual cusp developed next to the protocone, a so-called hypocone.
This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2021).
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n.1888