rhamphothecan.

Brit.

/ramfəˈθiːkə/, U.S.

/ˌræmfəˈθikə/

Forms: 1800s– ramphotheca, 1800s– rhamphotheca.

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

Etymology: < scientific Latin rhamphotheca ( J. K. W. Illiger Prodromus systematis mammalium et avium (1811) 150) < ancient Greek ῥάμϕος beak (see rhamphoid adj.) + θήκη sheath (see theca n.).The form ramphotheca is listed in R. G. Mayne Expos. Lexicon Med. Sci. (1860) 1068/2 as a scientific Latin term.

Ornithology.

The modified integument, usually horny but in some birds leathery, that covers a bird's jaws and forms the outer layer of the bill.

ΘΚΠ

the world > animals > birds > parts of or bird defined by > [noun] > beak or bill > covering of

sheath1781

rhamphotheca1870

1870 J. G. Cooper & S. F. Baird Ornithol. (Geol. Surv. Calif.) I. 567 Ramphotheca [indexed as rhamphotheca], the horny covering, or sheath of the jaws.

1910 W. P. Pycraft Hist. Birds xxvi. 448 In the Petrels the rhamphotheca is compound, that is to say, the horny sheath of both upper and lower jaws is made of several pieces.

1924 Auk 41 464 The postnasal membrane reaches the nostril in a narrow groove, well defined from the ramphotheca.

1972 P. Stettenheim in D. S. Farner et al. Avian Biol. II. i. 45 In ptarmigans..the rhamphotheca is shed intact after the breeding season.

2006 Current Biol. 16 371 Modern birds do not have teeth. Rather, they develop a specialised keratinized structure, called the rhamphotheca, that covers the mandible, maxillae, and pre-maxillae.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	rhamphotheca
释义	rhamphothecan. Brit. /ramfəˈθiːkə/, U.S. /ˌræmfəˈθikə/ Forms: 1800s– ramphotheca, 1800s– rhamphotheca. Origin: A borrowing from Latin. Etymon: Latin rhamphotheca. Etymology: < scientific Latin rhamphotheca ( J. K. W. Illiger Prodromus systematis mammalium et avium (1811) 150) < ancient Greek ῥάμϕος beak (see rhamphoid adj.) + θήκη sheath (see theca n.).The form ramphotheca is listed in R. G. Mayne Expos. Lexicon Med. Sci. (1860) 1068/2 as a scientific Latin term. Ornithology. The modified integument, usually horny but in some birds leathery, that covers a bird's jaws and forms the outer layer of the bill. ΘΚΠ the world > animals > birds > parts of or bird defined by > [noun] > beak or bill > covering of sheath1781 rhamphotheca1870 1870 J. G. Cooper & S. F. Baird Ornithol. (Geol. Surv. Calif.) I. 567 Ramphotheca [indexed as rhamphotheca], the horny covering, or sheath of the jaws. 1910 W. P. Pycraft Hist. Birds xxvi. 448 In the Petrels the rhamphotheca is compound, that is to say, the horny sheath of both upper and lower jaws is made of several pieces. 1924 Auk 41 464 The postnasal membrane reaches the nostril in a narrow groove, well defined from the ramphotheca. 1972 P. Stettenheim in D. S. Farner et al. Avian Biol. II. i. 45 In ptarmigans..the rhamphotheca is shed intact after the breeding season. 2006 Current Biol. 16 371 Modern birds do not have teeth. Rather, they develop a specialised keratinized structure, called the rhamphotheca, that covers the mandible, maxillae, and pre-maxillae. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1870
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