Mammalia
(||Mam*ma"li*a) n. pl. [NL., from L. mammalis. See Mammal.] (Zoöl.) 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 fetus 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 mammæ.
Mammalian
(Mam*ma"li*an) a. Of or pertaining to the Mammalia or mammals.
Mammaliferous
(Mam`ma*lif"er*ous) a. [Mammal + -ferous.] (Geol.) Containing mammalian remains; —
said of certain strata.
Mammalogical
(Mam`ma*log"ic*al) a. Of or pertaining to mammalogy.
Mammalogist
(Mam*mal"o*gist) n. [Cf. F. mammalogiste.] One versed in mammalogy.
Mammalogy
(Mam*mal"o*gy) n. [Mamma breast + -logy: cf. f. mammalogie.] The science which relates
to mammals or the Mammalia. See Mammalia.
Mammary
(Mam"ma*ry) a. [Cf. F. mammaire.] (Anat.) Of or pertaining to the mammæ or breasts; as,
the mammary arteries and veins.
Mammee
(Mam*mee") n. [Haytian mamey.] (Bot.) 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.
Mammer
(Mam"mer) v. i. [Cf. G. memme coward, poltroon.] To hesitate; to mutter doubtfully. [Obs.]
Mammet
(Mam"met) n. [See Mawmet.] An idol; a puppet; a doll. [Obs.] Selden. Shak.
Mammetry
(Mam"met*ry) n. See Mawmetry. [Obs.]
Mammifer
(Mam"mi*fer) n. [NL. See Mammiferous.] (Zoöl.) A mammal. See Mammalia.
Mammiferous
(Mam*mif"er*ous) a. [Mamma breast + -ferous: cf. F. mammifère.] Having breasts; of,
pertaining to, or derived from, the Mammalia.
Mammiform
(Mam"mi*form) a. [Mamma breast + -form: cf. F. mammiforme.] Having the form of a
mamma (breast) or mammæ.
Mammilla
(||Mam*mil"la) n.; pl. Mammilæ [L., dim. of mamma a breast.] (Anat.) The nipple.
