“paraconid”的英文意思_释义_用法

单词

paraconid

释义

paraconid|pærəˈkəʊnɪd|
[f. paracone + -id⁵.]
A cusp on a mammalian lower molar tooth corresponding to the paracone on an upper molar.
1888H. F. Osborn in Amer. Naturalist XXII. 1072 (table) Proposed terms... Paraconid.Ibid. 1076 As the hypocone develops, the paraconid recedes.1896Proc. Zool. Soc. 564 The ordinal position of the paraconid in the ontogeny may seem rather strange.1904, etc. [see metaconid].1922W. K. Gregory Origin & Evolution Human Dentition i. 84 It seems probable that the paraconid, metaconid, and entoconid, arose in situ on the slopes of the protoconid.1970Nature 25 July 356/1 The presence of a paraconid in such a position is more characteristic of fossil lemuroids and omomyoids.1975[see metaconid].

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