n. 伸长, 延长, 延伸率

[化] 伸长; 伸长率

[医] 展长, 伸长

Elongation \E`lon*ga"tion\ (?; 277), n. [LL. elongatio: cf. F.
['e]longation.]
1. The act of lengthening, or the state of being lengthened;
protraction; extension. ``Elongation of the fibers.''
--Arbuthnot.

2. That which lengthens out; continuation.

May not the mountains of Westmoreland and Cumberland
be considered as elongations of these two chains?
--Pinkerton.

3. Removal to a distance; withdrawal; a being at a distance;
distance.

The distant points in the celestial expanse appear
to the eye in so small a degree of elongation from
one another, as bears no proportion to what is real.
--Glanvill.

4. (Astron.) The angular distance of a planet from the sun;
as, the elongation of Venus or Mercury.