pygostylen.

Brit.

/ˈpʌɪɡ(ʊ)əstʌɪl/, U.S.

/ˈpaɪɡəˌstaɪl/

Origin: A borrowing from Greek, combined with an English element. Etymons: pygo- comb. form, Greek στῦλος.

Etymology: < pygo- comb. form + ancient Greek στῦλος column (see styloid adj.; compare also note at style n.).

Ornithology.

A triangular bony plate, formed of the fused caudal vertebrae, which supports the tail feathers in most birds.

ΘΚΠ

the world > animals > birds > parts of or bird defined by > [noun] > tail > bone in

ploughshare bone1777

pygostyle1868

vomer1872

1868 T. H. Huxley in Proc. Zool. Soc. 305 To these [sc. caudal vertebrae] succeeds the pygostyle, the number of vertebræ in which is not ascertainable.

1875 W. K. Parker in Encycl. Brit. III. 719/2 A ploughshare-shaped bone or pygostyle.

1899 Cambr. Nat. Hist. IX. 47 The tail [of Hesperornis] was fairly long and broad, but had no pygostyle.

a1933 J. A. Thomson Biol. for Everyman (1934) I. xx. 542 In all modern flying birds..there is a fusion of about four terminal vertebrae to form the ploughshare-bone or pygostyle.

1996 Daily Tel. 11 Jan. 21/2 The second fossil lacks a noticeable keel but its tail vertebrae are fused into one bone called a pygostyle, allowing the tail to be used as a rudder during flight.

Derivatives

† pygostyled adj. Obsolete rare forming a pygostyle; provided with a pygostyle.

ΘΚΠ

the world > animals > birds > parts of or bird defined by > [adjective] > of tail > of bone in

pygostyled1884

1884 E. Coues Key to N. Amer. Birds (ed. 2) iii. 238 Tail short (as to its vertebræ, which are pygostyled).

1890 Cent. Dict. Pygostyled, furnished with a pygostyle; forming or converted into a pygostyle.

pygoˈstylous adj. rare of the nature or function of a pygostyle.

ΚΠ

1903 Amer. Naturalist 37 61 The last..elements of..the vertebral chain coössified together in the adult, forming a flat, horizontally compressed, pygostylous mass.

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

单词	pygostyle
释义	pygostylen. Brit. /ˈpʌɪɡ(ʊ)əstʌɪl/, U.S. /ˈpaɪɡəˌstaɪl/ Origin: A borrowing from Greek, combined with an English element. Etymons: pygo- comb. form, Greek στῦλος. Etymology: < pygo- comb. form + ancient Greek στῦλος column (see styloid adj.; compare also note at style n.). Ornithology. A triangular bony plate, formed of the fused caudal vertebrae, which supports the tail feathers in most birds. ΘΚΠ the world > animals > birds > parts of or bird defined by > [noun] > tail > bone in ploughshare bone1777 pygostyle1868 vomer1872 1868 T. H. Huxley in Proc. Zool. Soc. 305 To these [sc. caudal vertebrae] succeeds the pygostyle, the number of vertebræ in which is not ascertainable. 1875 W. K. Parker in Encycl. Brit. III. 719/2 A ploughshare-shaped bone or pygostyle. 1899 Cambr. Nat. Hist. IX. 47 The tail [of Hesperornis] was fairly long and broad, but had no pygostyle. a1933 J. A. Thomson Biol. for Everyman (1934) I. xx. 542 In all modern flying birds..there is a fusion of about four terminal vertebrae to form the ploughshare-bone or pygostyle. 1996 Daily Tel. 11 Jan. 21/2 The second fossil lacks a noticeable keel but its tail vertebrae are fused into one bone called a pygostyle, allowing the tail to be used as a rudder during flight. Derivatives † pygostyled adj. Obsolete rare forming a pygostyle; provided with a pygostyle. ΘΚΠ the world > animals > birds > parts of or bird defined by > [adjective] > of tail > of bone in pygostyled1884 1884 E. Coues Key to N. Amer. Birds (ed. 2) iii. 238 Tail short (as to its vertebræ, which are pygostyled). 1890 Cent. Dict. Pygostyled, furnished with a pygostyle; forming or converted into a pygostyle. pygoˈstylous adj. rare of the nature or function of a pygostyle. ΚΠ 1903 Amer. Naturalist 37 61 The last..elements of..the vertebral chain coössified together in the adult, forming a flat, horizontally compressed, pygostylous mass. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online June 2022). < n.1868
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