propneusticadj.

Brit.

/prəʊˈnjuːstɪk/, U.S.

/ˌproʊˈn(j)ustɪk/

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: pro- prefix¹, -pneustic comb. form.

Etymology: < pro- prefix¹ + -pneustic comb. form, after German propneustisch ( J. A. Palmén Zur Morphologie des Tracheensystems (1877) vii. 79). Compare slightly earlier amphipneustic adj. at amphi- prefix , metapneustic adj., peripneustic adj.

Entomology.

Designating or having a respiratory system in which only the most anterior pair of spiracles is functional. Cf. amphipneustic adj. at amphi- prefix , metapneustic adj., peripneustic adj.

ΚΠ

1898 A. S. Packard Text-bk. Entomol. i. 462 Propneustic type,—The pupæ of Corethra, Culex, etc., in which only the most anterior pair of spiracles open.

1923 Ann. Entomol. Soc. Amer. 16 202 The tracheal system, which could not be distinguished in the first two stages, is now propneustic, only one pair of spiracles being present and these placed laterally on the second thoracic division.

1969 R. F. Chapman Insects xxiii. 457 The first instar larva..is metapneustic, the second instar is propneustic and the fourth instar hemipneustic.

1977 O. W. Richards & R. G. Davies Imms's Gen. Textbk. Entomol. (ed. 10) II. xxvi. 975 The propneustic condition is extremely rare.

This is a new entry (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	propneustic
释义	propneusticadj. Brit. /prəʊˈnjuːstɪk/, U.S. /ˌproʊˈn(j)ustɪk/ Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: pro- prefix¹, -pneustic comb. form. Etymology: < pro- prefix¹ + -pneustic comb. form, after German propneustisch ( J. A. Palmén Zur Morphologie des Tracheensystems (1877) vii. 79). Compare slightly earlier amphipneustic adj. at amphi- prefix , metapneustic adj., peripneustic adj. Entomology. Designating or having a respiratory system in which only the most anterior pair of spiracles is functional. Cf. amphipneustic adj. at amphi- prefix , metapneustic adj., peripneustic adj. ΚΠ 1898 A. S. Packard Text-bk. Entomol. i. 462 Propneustic type,—The pupæ of Corethra, Culex, etc., in which only the most anterior pair of spiracles open. 1923 Ann. Entomol. Soc. Amer. 16 202 The tracheal system, which could not be distinguished in the first two stages, is now propneustic, only one pair of spiracles being present and these placed laterally on the second thoracic division. 1969 R. F. Chapman Insects xxiii. 457 The first instar larva..is metapneustic, the second instar is propneustic and the fourth instar hemipneustic. 1977 O. W. Richards & R. G. Davies Imms's Gen. Textbk. Entomol. (ed. 10) II. xxvi. 975 The propneustic condition is extremely rare. This is a new entry (OED Third Edition, June 2007; most recently modified version published online March 2022). < adj.1898
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