metanephrosn.

Brit.

/ˌmɛtəˈnɛfrɒs/, U.S.

/ˌmɛdəˈnɛfrɑs/

Forms: 1800s– metanephros, 1800s– metanephron Brit.

/ˌmɛtəˈnɛfrɒn/, U.S.

/ˌmɛdəˈnɛfrɑn/ (rare). Plural 1800s– metanephra, 1800s– metanephroi.

Origin: A borrowing from Greek, combined with an English element; modelled on a German lexical item. Etymons: meta- prefix, Greek νεϕρός.

Etymology: < meta- prefix + ancient Greek νεϕρός kidney (see nephron n.), after German Metanephron (Haeckel Anthropogenie (1874) xxv. 672). In form metanephron after ancient Greek nouns in -ον . Compare French métanéphros (1897; slightly earlier in form metanephros (1893)). Compare the parallel formations mesonephros n., pronephros n. Compare later nephron n.

Embryology.

The most caudal and latest-developing part of the nephrogenic tissue of vertebrate embryos, which becomes the permanent kidney in amniotes. Cf. mesonephros n., pronephros n.

ΘΚΠ

the world > animals > animal body > general parts > substance or secretion and excretion > [noun] > part of organ from which kidney develops

metanephros1877

1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 430 A metanephron with metanephric duct distinct from the Wolffian or mesonephric duct.

1884 Q. Jrnl. Microsc. Sci. 24 79 The metanephros persists as the functional kidney.

1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xiv. 365 In both sexes alike, the metanephros and its duct become the kidney and ureter respectively.

1965 L. B. Arey Developmental Anat. (ed. 7) xvii. 295 The embryos of reptiles, birds and mammals develop first a rudimentary and functionless pronephros and then a mesonephros.., whereas the final kidney is a new organ, the metanephros.

1986 A. S. Romer & T. S. Parsons Vertebr. Body (ed. 6) xiii. 412 The mature kidneys, the metanephroi, are formed by a great expansion of nephric material in the region of the most posterior segments of the trunk.

1999 Pediatric Nephrol. 13 171 The metanephros of the ovine fetus has the important function of providing large quantities of dilute urine for the maintenance of amniotic and allantoic fluid volumes.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metanephros
释义	metanephrosn. Brit. /ˌmɛtəˈnɛfrɒs/, U.S. /ˌmɛdəˈnɛfrɑs/ Forms: 1800s– metanephros, 1800s– metanephron Brit. /ˌmɛtəˈnɛfrɒn/, U.S. /ˌmɛdəˈnɛfrɑn/ (rare). Plural 1800s– metanephra, 1800s– metanephroi. Origin: A borrowing from Greek, combined with an English element; modelled on a German lexical item. Etymons: meta- prefix, Greek νεϕρός. Etymology: < meta- prefix + ancient Greek νεϕρός kidney (see nephron n.), after German Metanephron (Haeckel Anthropogenie (1874) xxv. 672). In form metanephron after ancient Greek nouns in -ον . Compare French métanéphros (1897; slightly earlier in form metanephros (1893)). Compare the parallel formations mesonephros n., pronephros n. Compare later nephron n. Embryology. The most caudal and latest-developing part of the nephrogenic tissue of vertebrate embryos, which becomes the permanent kidney in amniotes. Cf. mesonephros n., pronephros n. ΘΚΠ the world > animals > animal body > general parts > substance or secretion and excretion > [noun] > part of organ from which kidney develops metanephros1877 1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 430 A metanephron with metanephric duct distinct from the Wolffian or mesonephric duct. 1884 Q. Jrnl. Microsc. Sci. 24 79 The metanephros persists as the functional kidney. 1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) xiv. 365 In both sexes alike, the metanephros and its duct become the kidney and ureter respectively. 1965 L. B. Arey Developmental Anat. (ed. 7) xvii. 295 The embryos of reptiles, birds and mammals develop first a rudimentary and functionless pronephros and then a mesonephros.., whereas the final kidney is a new organ, the metanephros. 1986 A. S. Romer & T. S. Parsons Vertebr. Body (ed. 6) xiii. 412 The mature kidneys, the metanephroi, are formed by a great expansion of nephric material in the region of the most posterior segments of the trunk. 1999 Pediatric Nephrol. 13 171 The metanephros of the ovine fetus has the important function of providing large quantities of dilute urine for the maintenance of amniotic and allantoic fluid volumes. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1877
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