pygo-|paɪgəʊ|repr. Gr. πῡγο-, combining form of πῡγή rump, used in the formation of zoological terms. pygoˈbranchiate [Gr. βράγχια gills] a., belonging to the Pygobranchia, a group of gastropods having the gills arranged round the anus; so pygoˈbranchious a. pygoˈmelian [Gr. µέλος limb] a., pertaining to or connected with a pyˈgomelus, a monster having a supernumerary limb behind or between the normal posterior pair; n. a pygomelian animal. ˈpygopage [ad. mod.L. pȳgopagus, f. Gr. πάγος that which is fixed or firmly set, f. πήγνυναι to fix, fasten], a monster consisting of twins united in the region of the buttocks; so pyˈgopagous a. pyˈgopagus = pygopage [a. F. pygopage (I. G. St.-Hilaire 1830, in Ann. des Sci. nat. XX. 338)]. ˈpygopod [Gr. πούς, ποδ- foot], (a) adj. of or pertaining to the Pygopodes, an order of aquatic birds, including the auks, grebes, and loons, having the legs set very far back; (b) adj. of or belonging to the genus Pygopus or family Pygopodidæ of Australian lizards having rudimentary hind legs; n. a lizard of this family; hence pyˈgopodous a. ˈpygostyle [Gr. στῦλος column], the vomer or triangular plate formed of the fused caudal vertebræ, which supports the tail-feathers in most birds; hence ˈpygostyled a., furnished with or forming a pygostyle.1858Mayne Expos. Lex., Pygobranchius,..applied by Gray to an order (Pygobranchia) of the Gasteropodophora..; *pygobranchious.1894Bateson Variation 401 note, *Pygomelian geese are often recorded.1891Amer. Nat. Oct. 894 The case of Rosa-Josepha is not entirely analogous and comparable to the two other *pygopages.1895Teratologia II. 274 Several of the *pygopagous twins of whom there are scientific records, survived birth and lived for a number of years.1902Brit. Med. Jrnl. 5 Apr. 850 Pygopagous twins..united together in the region of the nates and having each its own pelvis.1866Trans. Med. Soc. State of N.Y. XXIV. 224 The symmetrical *pygopagus is exceedingly rare.1903J. W. Williams Obstetrics xxxix. 680 Ischiopagi and pygopagi, as a rule, call for complicated and difficult manœuvres before delivery can be effected.1959Jrnl. Chronic Dis. X. 84 A wooden carving from the Solomon Islands suggests conjoined twins of the pygopagus type with the union of the bodies and heads and the extremities shortened by achondroplasia.1836Buck's Handbk. Med. Sc. II. 226 The heat of such homothermous animals as the whale, the seal, the walrus, and the *pygopodous birds.1875W. K. Parker in Encycl. Brit. III. 719/2 A ploughshare-shaped bone or *pygostyle.1899Evans Birds in Cambr. Nat. Hist. IX. 47 The tail [of Hesperornis] was fairly long and broad, but had no pygostyle.1884Coues Key N. Amer. Birds 238 Tail short (as to its vertebræ, which are *pygostyled).

pygo- /ˈpʌɪgəʊ/ combining form of Greek pugē rump: see -o-.

DERIVATIVE pyˈgomelus noun, pl. -li /-lʌɪ/, Medicine either of unequal conjoined twins in which the lesser is represented by a fleshy mass or supernumerary limb behind or between the posterior limbs E20.
pyˈgopagus noun, pl. -gi /-gʌɪ, -dʒʌɪ/, Medicine (the condition of) a pair of Siamese twins joined at the buttocks, often back to back M19.
pygostyle noun (Zoology) the triangular plate, formed of the fused caudal vertebrae, which supports the tail feathers in most birds L19.

pygo-
— see pyg-

pygo-

Prefix

zoology rump, posterior (of an animal)

Etymology

Ancient Greek πυγή (pugḗ, “tail, rump”)

Derived terms

pygopodous

pygostyle

词汇	pygo-
词根词缀	OED SOED Webster Wiktionary pygo-\|paɪgəʊ\|repr. Gr. πῡγο-, combining form of πῡγή rump, used in the formation of zoological terms. pygoˈbranchiate [Gr. βράγχια gills] a., belonging to the Pygobranchia, a group of gastropods having the gills arranged round the anus; so pygoˈbranchious a. pygoˈmelian [Gr. µέλος limb] a., pertaining to or connected with a *pyˈgomelus, a monster having a supernumerary limb behind or between the normal posterior pair; n. a pygomelian animal. ˈpygopage* [ad. mod.L. pȳgopagus, f. Gr. πάγος that which is fixed or firmly set, f. πήγνυναι to fix, fasten], a monster consisting of twins united in the region of the buttocks; so pyˈgopagous a. pyˈgopagus = pygopage [a. F. pygopage (I. G. St.-Hilaire 1830, in Ann. des Sci. nat. XX. 338)]. ˈpygopod [Gr. πούς, ποδ- foot], (a) adj. of or pertaining to the Pygopodes, an order of aquatic birds, including the auks, grebes, and loons, having the legs set very far back; (b) adj. of or belonging to the genus Pygopus or family Pygopodidæ of Australian lizards having rudimentary hind legs; n. a lizard of this family; hence pyˈgopodous a. ˈpygostyle [Gr. στῦλος column], the vomer or triangular plate formed of the fused caudal vertebræ, which supports the tail-feathers in most birds; hence ˈpygostyled a., furnished with or forming a pygostyle.1858Mayne Expos. Lex., Pygobranchius,..applied by Gray to an order (Pygobranchia) of the Gasteropodophora..; pygobranchious.1894Bateson Variation* 401 note, Pygomelian geese are often recorded.1891Amer. Nat. Oct. 894 The case of Rosa-Josepha is not entirely analogous and comparable to the two other pygopages.1895Teratologia II. 274 Several of the pygopagous twins of whom there are scientific records, survived birth and lived for a number of years.1902Brit. Med. Jrnl. 5 Apr. 850 Pygopagous twins..united together in the region of the nates and having each its own pelvis.1866Trans. Med. Soc. State of N.Y. XXIV. 224 The symmetrical pygopagus is exceedingly rare.1903J. W. Williams Obstetrics xxxix. 680 Ischiopagi and pygopagi, as a rule, call for complicated and difficult manœuvres before delivery can be effected.1959Jrnl. Chronic Dis. X. 84 A wooden carving from the Solomon Islands suggests conjoined twins of the pygopagus type with the union of the bodies and heads and the extremities shortened by achondroplasia.1836Buck's Handbk. Med. Sc. II. 226 The heat of such homothermous animals as the whale, the seal, the walrus, and the pygopodous birds.1875W. K. Parker in Encycl. Brit.* III. 719/2 A ploughshare-shaped bone or pygostyle.1899Evans Birds* in Cambr. Nat. Hist. IX. 47 The tail [of Hesperornis] was fairly long and broad, but had no pygostyle.1884Coues Key N. Amer. Birds 238 Tail short (as to its vertebræ, which are pygostyled). pygo- /ˈpʌɪgəʊ/ combining form of Greek pugē rump: see -o-. DERIVATIVE pyˈgomelus noun, pl. -li /-lʌɪ/, Medicine either of unequal conjoined twins in which the lesser is represented by a fleshy mass or supernumerary limb behind or between the posterior limbs E20. pyˈgopagus noun, pl. -gi /-gʌɪ, -dʒʌɪ/, Medicine (the condition of) a pair of Siamese twins joined at the buttocks, often back to back M19. pygostyle noun (Zoology) the triangular plate, formed of the fused caudal vertebrae, which supports the tail feathers in most birds L19. pygo-* — see pyg- pygo- Prefix zoology rump, posterior (of an animal) Etymology Ancient Greek πυγή (pugḗ, “tail, rump”) Derived terms pygopodous pygostyle
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