英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
字典
Umbilication
(n.)
A slight, navel-like depression, or dimpling, of the
center of a rounded body; as, the umbilication of a smallpox vesicle;
also, the condition of being umbilicated.
Umbilicus
(n.)
The depression, or mark, in the median line of the
abdomen, which indicates the point where the umbilical cord separated
from the fetus; the navel.
Umbilicus
(n.)
An ornamented or painted ball or boss fastened at each
end of the stick on which manuscripts were rolled.
Umbilicus
(n.)
The hilum.
Umbilicus
(n.)
A depression or opening in the center of the base of
many spiral shells.
Umbilicus
(n.)
Either one of the two apertures in the calamus of a
feather.
Umbilicus
(n.)
One of foci of an ellipse, or other curve.
Umbilicus
(n.)
A point of a surface at which the curvatures of the
normal sections are all equal to each other. A sphere may be osculatory
to the surface in every direction at an umbilicus. Called also umbilic.
A pie made of umbles. See To eat humble pie, under Humble.
Umbles
(n. pl.)
The entrails and coarser parts of a deer; hence,
sometimes, entrails, in general.
Umbo
(n.)
The boss of a shield, at or near the middle, and usually
projecting, sometimes in a sharp spike.
Umbo
(n.)
A boss, or rounded elevation, or a corresponding depression,
in a palate, disk, or membrane; as, the umbo in the integument of the
larvae of echinoderms or in the tympanic membrane of the ear.
Umbo
(n.)
One of the lateral prominence just above the hinge of a
bivalve shell.
Umbonate
(a.)
Alt. of Umbonated
Umbonated
(a.)
Having a conical or rounded projection or protuberance,
like a boss.
Umbones
(pl. )
of Umbo
Umbos
(pl. )
of Umbo
Umbra
(n.)
The conical shadow projected from a planet or satellite, on
the side opposite to the sun, within which a spectator could see no
portion of the sun's disk; -- used in contradistinction from penumbra.
See Penumbra.
Umbra
(n.)
The central dark portion, or nucleus, of a sun spot.
Umbra
(n.)
The fainter part of a sun spot; -- now more commonly called
penumbra.