keratoidadj.

/ˈkɛrətɔɪd/

Etymology: < Greek κερατοειδής horn-like: see keratode n. and -oid suffix.

1. Mathematics. Resembling a horn in shape. keratoid cusp n. a cusp at which the two branches of the curve lie on opposite sides of the common tangent; a cusp of the first species.

ΚΠ

1873 G. Salmon Treat. Higher Plane Curves 46 These two kinds of cusps have been called keratoid and ramphoid from a fancied resemblance to the forms of a horn and a beak.

1875 I. Todhunter Diff. Calculus (ed. 7) xxii. §301 Cusps of the first species have been called ‘keratoid cusps’.

2. Resembling horn in substance.

ΘΚΠ

the world > life > biology > substance > [adjective] > hardened or horny

cornigerous1646

calcified1835

calcifying1836

cornified1859

calcific1869

keratoida1883

a1883 C. H. Fagge Princ. & Pract. Med. (1886) I. 117 The analogy of keratoid carcinoma..suggests that they may be in great part made up of pre-existing tissue elements.

This entry has not yet been fully updated (first published 1901; most recently modified version published online June 2018).

单词	keratoid
释义	keratoidadj. /ˈkɛrətɔɪd/ Etymology: < Greek κερατοειδής horn-like: see keratode n. and -oid suffix. 1. Mathematics. Resembling a horn in shape. keratoid cusp n. a cusp at which the two branches of the curve lie on opposite sides of the common tangent; a cusp of the first species. ΚΠ 1873 G. Salmon Treat. Higher Plane Curves 46 These two kinds of cusps have been called keratoid and ramphoid from a fancied resemblance to the forms of a horn and a beak. 1875 I. Todhunter Diff. Calculus (ed. 7) xxii. §301 Cusps of the first species have been called ‘keratoid cusps’. 2. Resembling horn in substance. ΘΚΠ the world > life > biology > substance > [adjective] > hardened or horny cornigerous1646 calcified1835 calcifying1836 cornified1859 calcific1869 keratoida1883 a1883 C. H. Fagge Princ. & Pract. Med. (1886) I. 117 The analogy of keratoid carcinoma..suggests that they may be in great part made up of pre-existing tissue elements. This entry has not yet been fully updated (first published 1901; most recently modified version published online June 2018). < adj.1873
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