| mammal | <zoology> One of the Mammalia. Age of mammals. Origin: L. Mammalis belonging to the breast, fr. Mamma the breast or pap: cf. F. Mammal. (20 Mar 1998) |
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| mammalgia | Synonym: mastodynia. Origin: L. Mamma, breast, + G. Algos, pain (05 Mar 2000) |
| mammalia | <zoology> The highest class of Vertebrata. The young are nourished for a time by milk, or an analogous fluid, secreted by the mammary glands of the mother. Mammalia are divided into three subclasses; I. Placentalia. This subclass embraces all the higher orders, including man. In these the foetus is attached to the uterus by a placenta. II. Marsupialia. In these no placenta is formed, and the young, which are born at an early state of development, are carried for a time attached to the teats, and usually protected by a marsupial pouch. The opossum, kangaroo, wombat, and koala are examples. III. Monotremata. In this group, which includes the genera Echidna and Ornithorhynchus, the female lays large eggs resembling those of a bird or lizard, and the young, which are hatched like those of birds, are nourished by a watery secretion from the imperfectly developed mammae. Origin: NL, from L. Mammalis. See Mammal. (20 Mar 1998) |
| mammalian expression vector | <molecular biology> A vector that will produce large amounts of eukaryotic protein taxonomy notwithstanding, and not necessarily a protein from a mammal. (20 Mar 1998) |
| mammaliferous | <geology> Containing mammalian remains; said of certain strata. Origin: Mammal. Source: Websters Dictionary (01 Mar 1998) |
| mammals | Warm-blooded vertebrate animals belonging to the class mammalia, including all that possess hair and suckle their young. It includes three major groups: placentals and marsupials, which are vivparous, and monotremes, which are oviparous. (12 Dec 1998) |