umbilicus
n . 臍,中心
臍,中心
umbilicus n 1 :
a scar where the umbilical cord was attached ; "
you were not supposed to show your navel on television "; "
they argued whether or not Adam had a navel "; "
she had a tattoo just above her bellybutton " [
synonym : {
navel }, {
umbilicus },
{
bellybutton }, {
belly button }, {
omphalos }, {
omphalus }]
Umbilicus \
Um `
bi *
li "
cus \,
n . [
L .
See {
Umbilic }.]
1 . (
Anat .)
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 ;
the belly button ,
in humans .
[
1913 Webster ]
2 . (
Gr . &
Rom .
Antiq .)
An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled . --
Dr .
W .
Smith .
[
1913 Webster ]
3 . (
Bot .)
The hilum .
[
1913 Webster ]
4 . (
Zool .)
(
a )
A depression or opening in the center of the base of many spiral shells .
(
b )
Either one of the two apertures in the calamus of a feather .
[
1913 Webster ]
5 . (
Geom .)
(
a )
One of the foci of an ellipse ,
or other curve . [
Obs .]
(
b )
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 }.
[
1913 Webster ]
24 Moby Thesaurus words for "
umbilicus ":
axis ,
center ,
center of action ,
center of gravity ,
centroid ,
centrum ,
core ,
dead center ,
epicenter ,
heart ,
hub ,
kernel ,
marrow ,
medulla ,
metacenter ,
middle ,
nave ,
navel ,
nub ,
nucleus ,
omphalos ,
pith ,
pivot ,
storm center
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