from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various warm-blooded vertebrate animals of the class Mammalia, including humans, characterized by a covering of hair on the skin and, in the female, milk-producing mammary glands for nourishing the young.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An animal of the class Mammalia, characterized by being warm-blooded, having hair and feeding milk to its young.
- n. A vertebrate with three bones in the inner ear and one in the jaw.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the Mammalia.
from The Century Dictionary and Cyclopedia
- Having breasts or teats; mammiferous.
- n. An animal of the class Mammalia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
From Late Latin mammālis, of the breast, from Latin mamma, breast; see mā-2 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Modern Latin Mammalia, coined 1758 by Linnaeus for the class of mammals, from neuter plural of Late Latin mammalis ("of the breast"), from Latin mamma ("breast"), perhaps cognate with mamma (mother). (Wiktionary)