acrodontn.adj.

Brit.

/ˈakrədɒnt/, U.S.

/ˈækrəˌdɑnt/

Origin: A borrowing from Latin. Etymon: Latin acrodontes.

Etymology: < scientific Latin acrodontes, plural ( J. G. Wagler Natürliches System der Amphibien (1830) 237) < acro- acro- comb. form + ancient Greek -οδόντ- , -όδους -odont comb. form. Compare French acrodontes, plural (1834).

Zoology.

A. n.

An animal, esp. a reptile, whose teeth lack sockets and are permanently attached to the summit of the alveolar ridge of the jaw.

ΘΚΠ

the world > animals > reptiles > order Squamata (lizards and snakes) > suborder Lacertilia (lizards) > [noun] > acrodont

acrodont1838

1838 Penny Cycl. XII. 441/1 The Acrodonts, on the contrary, are confined to Asia, Africa, Australasia, and, in a single instance, the south of Europe.

1849–52 Todd's Cycl. Anat. & Physiol. IV. ii. 884/1 In a few Iguanians..the teeth appear to be soldered to the margins of the jaws; these have been termed ‘Acrodonts’.

1868 Proc. Acad. Nat. Sci. Philadelphia 252 Other Acrodonts are equivalent, in this respect, to the young of Uromastix, etc.

1903 C. R. Eastman in Bull. Mus. Compar. Zoöl. Harvard 39 186 The great groups of Cochliodonts, Orodonts, Acrodonts, and Hybodonts may all be considered as derivatives from the Cestraciont stem.

2009 Molecular Phylogenetics & Evol. 50 391/2 Chamaeleonidae is a well-supported clade within acrodonts.

B. adj.

Designating teeth which are permanently attached to the summit of the alveolar ridge of the jaw, as in many squamate reptiles and some teleost fish; of, relating to, or characterized by such teeth.

ΚΠ

1845 R. Owen Odontography I. ii. iv. 258 The maxillary teeth combine the pleodont with the acrodont characters.

1873 St. G. Mivart Lessons Elem. Anat. vii. 256 We may have teeth which become anchylosed to the summit of the jaw, there being no bony wall..developed on either the inner or the outer side of the teeth, as in certain Lizards..termed Acrodont.

1951 G. R. de Beer Vertebr. Zool. (ed. 2) xviii. 226 In Sphenodon and Chamoelo the teeth are fused on to the edge of the bone (acrodont condition) and are not replaced.

1994 Geobios 27 621 The remaining two specimens have an acrodont dentition and are juvenile rhynchocephalians.

2001 S. G. Lucas Chinese Fossil Vertebr. vii. 96 Santaisaurus has small, subpleurodont teeth, not the acrodont (‘proto-thecodont’) teeth of procolophonids.

This entry has been updated (OED Third Edition, December 2011; most recently modified version published online June 2022).

单词	acrodont
释义	acrodontn.adj. Brit. /ˈakrədɒnt/, U.S. /ˈækrəˌdɑnt/ Origin: A borrowing from Latin. Etymon: Latin acrodontes. Etymology: < scientific Latin acrodontes, plural ( J. G. Wagler Natürliches System der Amphibien (1830) 237) < acro- acro- comb. form + ancient Greek -οδόντ- , -όδους -odont comb. form. Compare French acrodontes, plural (1834). Zoology. A. n. An animal, esp. a reptile, whose teeth lack sockets and are permanently attached to the summit of the alveolar ridge of the jaw. ΘΚΠ the world > animals > reptiles > order Squamata (lizards and snakes) > suborder Lacertilia (lizards) > [noun] > acrodont acrodont1838 1838 Penny Cycl. XII. 441/1 The Acrodonts, on the contrary, are confined to Asia, Africa, Australasia, and, in a single instance, the south of Europe. 1849–52 Todd's Cycl. Anat. & Physiol. IV. ii. 884/1 In a few Iguanians..the teeth appear to be soldered to the margins of the jaws; these have been termed ‘Acrodonts’. 1868 Proc. Acad. Nat. Sci. Philadelphia 252 Other Acrodonts are equivalent, in this respect, to the young of Uromastix, etc. 1903 C. R. Eastman in Bull. Mus. Compar. Zoöl. Harvard 39 186 The great groups of Cochliodonts, Orodonts, Acrodonts, and Hybodonts may all be considered as derivatives from the Cestraciont stem. 2009 Molecular Phylogenetics & Evol. 50 391/2 Chamaeleonidae is a well-supported clade within acrodonts. B. adj. Designating teeth which are permanently attached to the summit of the alveolar ridge of the jaw, as in many squamate reptiles and some teleost fish; of, relating to, or characterized by such teeth. ΚΠ 1845 R. Owen Odontography I. ii. iv. 258 The maxillary teeth combine the pleodont with the acrodont characters. 1873 St. G. Mivart Lessons Elem. Anat. vii. 256 We may have teeth which become anchylosed to the summit of the jaw, there being no bony wall..developed on either the inner or the outer side of the teeth, as in certain Lizards..termed Acrodont. 1951 G. R. de Beer Vertebr. Zool. (ed. 2) xviii. 226 In Sphenodon and Chamoelo the teeth are fused on to the edge of the bone (acrodont condition) and are not replaced. 1994 Geobios 27 621 The remaining two specimens have an acrodont dentition and are juvenile rhynchocephalians. 2001 S. G. Lucas Chinese Fossil Vertebr. vii. 96 Santaisaurus has small, subpleurodont teeth, not the acrodont (‘proto-thecodont’) teeth of procolophonids. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online June 2022). < n.adj.1838
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