| mammary ridge | Bandlike thickening of ectoderm in the embryo extending on either side from just below the axilla to the inguinal region; in human embryos, the mammary glands arise from primordia in the thoracic part of the ridge, the balance of the ridge disappearing; in some lower mammals which give birth to a litter of young, several milk glands develop along these lines. Synonym: mammary fold, milk line, milk ridge. (05 Mar 2000) |
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| mammary souffle | A blowing murmur heard late in pregnancy and during lactation at the medial border of the breast, sometimes only systolic and sometimes continuous. (05 Mar 2000) |
| mammary tumour virus | <organism, virology> Retrovirus that induces mammary carcinoma in mice. Isolated from highly inbred strains that had very high incidence of the tumours, after the discovery that the disease was transmitted by nursing mothers in milk. Endogenous provirus present in germ line of all inbred mice. Transcription of the provirus is regulated by a viral promoter that increases transcription in response to glucocorticoid hormones. May transform by proviral insertion activating the cellular int 1 oncogene (18 Nov 1997) |
| mammary tumour virus of mice | Member of the retrovirus subfamily Oncornavirinae, antigenically distinct from the murine leukaemia-sarcoma complex, that is associated with adenocarcinomatous tumours of the mammary gland, commonly latent in wild and laboratory mice and causing cancer only in genetically susceptible strains under certain hormonal influences. Synonym: Bittner agent, Bittner virus, Bittner's milk factor, mammary cancer virus of mice, milk factor, mouse mammary tumour virus. (05 Mar 2000) |
| mammary tumour viruses, mouse | The type species of mammalian type b retroviruses (retroviruses type b, mammalian) commonly latent in mice. It causes mammary adenocarcinoma when in a genetically susceptible strain of mice and when the appropriate hormonal influences operate. (12 Dec 1998) |
| mammectomy | Synonym: mastectomy. Origin: L. Mamma, breast, + ektome, excision (05 Mar 2000) |
| mammee | <botany> A fruit tree of tropical America, belonging to the genus Mammea (M. Americana); also, its fruit. The latter is large, covered with a thick, tough ring, and contains a bright yellow pulp of a pleasant taste and fragrant scent. It is often called mammee apple. Origin: Haytian mamey. Source: Websters Dictionary (01 Mar 1998) |
| mammifer | <zoology> A mammal. See Mammalia. Origin: NL. See Mammiferous. Source: Websters Dictionary (01 Mar 1998) |
| mammiform | Resembling a breast; breast-shaped. Synonym: mammose. Origin: L. Mamma, breast, + forma, form (05 Mar 2000) |
| mammil- | Mammilli- The mamillae. See: mamil-. Compare: thelo-. Origin: L. Mammilla (mamilla), nipple (05 Mar 2000) |
| mammilla | Origin: L, dim. Of mamma a breast. <anatomy> The nipple. Source: Websters Dictionary (01 Mar 1998) |
| mammillaplasty | Plastic surgery of the nipple and areola. Synonym: theleplasty. Origin: L. Mammilla, nipple, + G. Plastos, formed (05 Mar 2000) |
| mammillary | 1. Of or pertaining to the mammilla, or nipple, or to the breast; resembling a mammilla; mammilloid. 2. <chemical> Composed of convex convex concretions, somewhat resembling the breasts in form; studded with small mammiform protuberances. Origin: Cf. F. Mammilaire. See Mammilla. Source: Websters Dictionary (01 Mar 1998) |
| mammillate | Having small nipple-shaped projections. (09 Oct 1997) |
| mammillated | 1. Having small nipples, or small protuberances like nipples or mammae. 2. <zoology> Bounded like a nipple; said of the apex of some shells. See: Mammilla. Source: Websters Dictionary (01 Mar 1998) |