| slovo | definícia |
placental
(encz) | placental,týkající se placenty adj: Zdeněk Brož |
Placental
(gcide) | Placental \Pla*cen"tal\, a.
1. Of or pertaining to the placenta; having, or characterized
by having, a placenta; as, a placental mammal.
[1913 Webster]
2. (Zool.) Of or pertaining to the Placentalia.
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Placental
(gcide) | Placental \Pla*cen"tal\, n. (Zool.)
One of the Placentalia.
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placental
(wn) | placental
adj 1: pertaining to or having or occurring by means of a
placenta; "all mammals except monotremes and marsupials
are placental mammals" [ant: aplacental]
n 1: mammals having a placenta; all mammals except monotremes
and marsupials [syn: placental, placental mammal,
eutherian, eutherian mammal] |
| | podobné slovo | definícia |
placental mammal
(encz) | placental mammal, n: |
transplacental
(encz) | transplacental, adj: |
Aplacental
(gcide) | Aplacental \Ap`la*cen"tal\, a. [Pref. a- + placental.]
Belonging to the Aplacentata; without placenta.
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Implacental
(gcide) | Implacental \Im`pla*cen"tal\, a. (Zool.)
Without a placenta, as marsupials and monotremes;
nonplacental. -- n. A mammal having no placenta; a
nonplacental mammal.
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Implacentalia
(gcide) | Implacentalia \Im`pla*cen*ta"li*a\, n. pl. [NL. See In- not,
and Placental.] (Zool.)
A primary division of the Mammalia, including the monotremes
and marsupials, in which no placenta is formed.
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Placental
(gcide) | Placental \Pla*cen"tal\, a.
1. Of or pertaining to the placenta; having, or characterized
by having, a placenta; as, a placental mammal.
[1913 Webster]
2. (Zool.) Of or pertaining to the Placentalia.
[1913 Webster]Placental \Pla*cen"tal\, n. (Zool.)
One of the Placentalia.
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Placentalia
(gcide) | Placentalia \Plac`en*ta"li*a\, n. pl. [NL.] (Zool.)
A division of Mammalia including those that have a placenta,
or all the orders above the marsupials.
[1913 Webster]Mammalia \Mam*ma"li*a\, n. pl. [NL., from L. mammalis. See
Mammal.] (Zool.)
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.
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Note: Mammalia are divided into three subclasses;
[1913 Webster] I. Placentalia. This subclass embraces
all the higher orders, including man. In these the
fetus is attached to the uterus by a placenta.
[1913 Webster] 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.
[1913 Webster] 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.
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aplacental
(wn) | aplacental
adj 1: having no placenta; "monotremes and marsupials are
aplacental mammals" [ant: placental] |
placental mammal
(wn) | placental mammal
n 1: mammals having a placenta; all mammals except monotremes
and marsupials [syn: placental, placental mammal,
eutherian, eutherian mammal] |
transplacental
(wn) | transplacental
adj 1: occurring through or by way of the placenta;
"transplacental passage of nutrients" |
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