pseudobranchn.

Brit.

/ˈs(j)uːdə(ʊ)ˌbraŋk/, U.S.

/ˈsudoʊˌbræŋk/

Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, -branch comb. form.

Etymology: < pseudo- comb. form + -branch comb. form. Compare earlier pseudobranchia n.

Zoology.

A structure resembling a gill, but not functioning as one; spec. (in many fishes) a structure anterior to the gills that in adults receives blood that has already been oxygenated in the gills, but which may have had a respiratory function in early life.

ΚΠ

1885 Standard Nat. Hist. III. 43 This gill is not functional,—it receives only already aërated blood, and is therefore known as a false gill or pseudobranch.

1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xii. 247 The pseudobranch is a vestigial gill, consisting of about half a dozen small parallel folds, on the anterior wall of the spiracle.

1962 K. F. Lagler et al. Ichthyol. viii. 232 Rayfin bony fishes (Actinopterygii) retain a hyoidean pseudobranch..that is free in some fishes but skin-covered in others.

1995 P. J. Hayward et al. in P. J. Hayward & J. S. Ryland Handbk. Marine Fauna N.W. Europe x. 539/2 In the Dotoidae [sc. sea slugs]..the cerata function as gills and some have flap-like basal extensions called pseudobranchs.

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

单词	pseudobranch
释义	pseudobranchn. Brit. /ˈs(j)uːdə(ʊ)ˌbraŋk/, U.S. /ˈsudoʊˌbræŋk/ Origin: Formed within English, by compounding. Etymons: pseudo- comb. form, -branch comb. form. Etymology: < pseudo- comb. form + -branch comb. form. Compare earlier pseudobranchia n. Zoology. A structure resembling a gill, but not functioning as one; spec. (in many fishes) a structure anterior to the gills that in adults receives blood that has already been oxygenated in the gills, but which may have had a respiratory function in early life. ΚΠ 1885 Standard Nat. Hist. III. 43 This gill is not functional,—it receives only already aërated blood, and is therefore known as a false gill or pseudobranch. 1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xii. 247 The pseudobranch is a vestigial gill, consisting of about half a dozen small parallel folds, on the anterior wall of the spiracle. 1962 K. F. Lagler et al. Ichthyol. viii. 232 Rayfin bony fishes (Actinopterygii) retain a hyoidean pseudobranch..that is free in some fishes but skin-covered in others. 1995 P. J. Hayward et al. in P. J. Hayward & J. S. Ryland Handbk. Marine Fauna N.W. Europe x. 539/2 In the Dotoidae [sc. sea slugs]..the cerata function as gills and some have flap-like basal extensions called pseudobranchs. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1885
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