偏近点角

Eccentric \Ec*cen"tric\ ([e^]k*s[e^]n"tr[i^]k), a. [F.
excentrique, formerly also spelled eccentrique, fr. LL.
eccentros out of the center, eccentric, Gr. 'e`kkentros; 'ek
out of + ke`ntron center. See {Ex-}, and {Center}, and cf.
{Excentral}.]
1. Deviating or departing from the center, or from the line
of a circle; as, an eccentric or elliptical orbit;
pertaining to deviation from the center or from true
circular motion.

2. Not having the same center; -- said of circles, ellipses,
spheres, etc., which, though coinciding, either in whole
or in part, as to area or volume, have not the same
center; -- opposed to {concentric}.

3. (Mach.) Pertaining to an eccentric; as, the eccentric rod
in a steam engine.

4. Not coincident as to motive or end.

His own ends, which must needs be often eccentric to
those of his master. --Bacon.

5. Deviating from stated methods, usual practice, or
established forms or laws; deviating from an appointed
sphere or way; departing from the usual course; irregular;
anomalous; odd; as, eccentric conduct. ``This brave and
eccentric young man.'' --Macaulay.

He shines eccentric, like a comet's blaze. --Savage.

{Eccentric anomaly}. (Astron.) See {Anomaly}.

{Eccentric chuck} (Mach.), a lathe chuck so constructed that
the work held by it may be altered as to its center of
motion, so as to produce combinations of eccentric
combinations of eccentric circles.

{Eccentric gear}. (Mach.)
(a) The whole apparatus, strap, and other parts, by which
the motion of an eccentric is transmitted, as in the
steam engine.
(b) A cogwheel set to turn about an eccentric axis used to
give variable rotation.

{Eccentric hook} or {Eccentric gab}, a hook-shaped journal
box on the end of an eccentric rod, opposite the strap.

{Eccentric rod}, the rod that connects an eccentric strap
with any part to be acted upon by the eccentric.

{Eccentric sheave}, or {Eccentric pulley}, an eccentric.

{Eccentric strap}, the ring, operating as a journal box, that
encircles and receives motion from an eccentric; -- called
also {eccentric hoop}.

Syn: Irregular; anomalous; singular; odd; peculiar; erratic;
idiosyncratic; strange; whimsical.