protractileadj.

Brit.

/prəˈtraktʌɪl/, U.S.

/prəˈtrækt(ə)l/,

/proʊˈtrækt(ə)l/,

/proʊˈtrækˌtaɪl/,

/prəˈtrækˌtaɪl/

Origin: Formed within English, by derivation; perhaps modelled on a French lexical item. Etymons: protract v., -ile suffix.

Etymology: < protract v. + -ile suffix, after either contractile adj., retractile adj.¹, or French protractile (1805 in Cuvier).

Chiefly Zoology.

Able to be lengthened out or extended.

ΘΚΠ

the world > animals > animal body > general parts > [adjective] > extended or extendable

protractile?a1808

projectile1817

porrect1819

protrusile1846

porrectate1890

?a1808 Universal Syst. Nat. Hist. IX. 459 The Banded Chetodon... Head conic-obtuse; upper lip protractile.

1828 J. Stark Elements Nat. Hist. I. 135 Echidna... Toothless, but the palate aculeated;..tongue protractile.

1878 F. J. Bell & E. R. Lankester tr. C. Gegenbaur Elements Compar. Anat. 298 A narrow coiled continuation of this leads to the protractile ovipositor.

1931 E. G. Boulenger Fishes xv. 114 The Deal Fishes and Oar Fishes (family Trachypteridæ) are fantastic creatures with silvery bodies as thin as knives and fore-shortened heads and protractile mouths.

1976 Amer. Midland Naturalist 95 492 The most plantivorous fishes typically have small protractile mouths which facilitate increased suction.

2004 Biophysical Chem. 107 283 [There are] two different kinds of mechanical distortions, either contractile or protractile ones, occurring within a sliding actin filament.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	protractile
释义	protractileadj. Brit. /prəˈtraktʌɪl/, U.S. /prəˈtrækt(ə)l/, /proʊˈtrækt(ə)l/, /proʊˈtrækˌtaɪl/, /prəˈtrækˌtaɪl/ Origin: Formed within English, by derivation; perhaps modelled on a French lexical item. Etymons: protract v., -ile suffix. Etymology: < protract v. + -ile suffix, after either contractile adj., retractile adj.¹, or French protractile (1805 in Cuvier). Chiefly Zoology. Able to be lengthened out or extended. ΘΚΠ the world > animals > animal body > general parts > [adjective] > extended or extendable protractile?a1808 projectile1817 porrect1819 protrusile1846 porrectate1890 ?a1808 Universal Syst. Nat. Hist. IX. 459 The Banded Chetodon... Head conic-obtuse; upper lip protractile. 1828 J. Stark Elements Nat. Hist. I. 135 Echidna... Toothless, but the palate aculeated;..tongue protractile. 1878 F. J. Bell & E. R. Lankester tr. C. Gegenbaur Elements Compar. Anat. 298 A narrow coiled continuation of this leads to the protractile ovipositor. 1931 E. G. Boulenger Fishes xv. 114 The Deal Fishes and Oar Fishes (family Trachypteridæ) are fantastic creatures with silvery bodies as thin as knives and fore-shortened heads and protractile mouths. 1976 Amer. Midland Naturalist 95 492 The most plantivorous fishes typically have small protractile mouths which facilitate increased suction. 2004 Biophysical Chem. 107 283 [There are] two different kinds of mechanical distortions, either contractile or protractile ones, occurring within a sliding actin filament. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < adj.?a1808
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