mammotrophinn.

Brit.

/ˌmamə(ʊ)ˈtrəʊfɪn/, U.S.

/ˌmæməˈtroʊfən/

Forms: 1900s– mammotrophin, 1900s– mammotropin.

Origin: Formed within English, by derivation. Etymons: mammotrophic adj., -in suffix¹.

Etymology: < mammotroph- (in mammotrophic adj.) + -in suffix¹. For the form mammotropin compare mammotrophic adj.

Physiology.

Originally: †the hormone prolactin (obsolete). In later use: any substance having mammotrophic activity.

ΚΠ

1935 W. R. Lyons & E. Page in Proc. Soc. Exper. Biol. & Med. 1934–5 32 1049 (heading) Detection of mammotropin in the urine of lactating women.

1952 S. J. Folley in A. S. Parkes Marshall's Physiol. Reproduction (ed. 3) II. xx. 558 When first discovered it was variously named prolactin (Riddle), galactin (Turner) and mammotropin (Lyons).

1958 Proc. Royal Soc. B. 149 309 By adding mammotrophin (MH) to these steroids, incomplete lobulo-alveolar growth was induced.

1961 Lancet 7 Oct. 792/1 The demonstration of mammotrophin activity.

1972 Exper. Animals (Japan) 21 209 Differences in mammary development and pituitary and placental mammotropin levels of two inbred strains of mice.

1991 Mouse Genome 89 468 Small litter size and low weaning rate probably due to low pituitary and placental mammotrophin secretion during pregnancy.

This entry has been updated (OED Third Edition, June 2000; most recently modified version published online March 2022).

单词	mammotrophin
释义	mammotrophinn. Brit. /ˌmamə(ʊ)ˈtrəʊfɪn/, U.S. /ˌmæməˈtroʊfən/ Forms: 1900s– mammotrophin, 1900s– mammotropin. Origin: Formed within English, by derivation. Etymons: mammotrophic adj., -in suffix¹. Etymology: < mammotroph- (in mammotrophic adj.) + -in suffix¹. For the form mammotropin compare mammotrophic adj. Physiology. Originally: †the hormone prolactin (obsolete). In later use: any substance having mammotrophic activity. ΚΠ 1935 W. R. Lyons & E. Page in Proc. Soc. Exper. Biol. & Med. 1934–5 32 1049 (heading) Detection of mammotropin in the urine of lactating women. 1952 S. J. Folley in A. S. Parkes Marshall's Physiol. Reproduction (ed. 3) II. xx. 558 When first discovered it was variously named prolactin (Riddle), galactin (Turner) and mammotropin (Lyons). 1958 Proc. Royal Soc. B. 149 309 By adding mammotrophin (MH) to these steroids, incomplete lobulo-alveolar growth was induced. 1961 Lancet 7 Oct. 792/1 The demonstration of mammotrophin activity. 1972 Exper. Animals (Japan) 21 209 Differences in mammary development and pituitary and placental mammotropin levels of two inbred strains of mice. 1991 Mouse Genome 89 468 Small litter size and low weaning rate probably due to low pituitary and placental mammotrophin secretion during pregnancy. This entry has been updated (OED Third Edition, June 2000; most recently modified version published online March 2022). < n.1935
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