n. 成对物, 偶极天线, 对称振子, 偶极子, 对偶物

[计] 二位字节

[化] 双峰; 双重谱线

[医] 双重线, 双合透镜

[ noun ]
a man's close-fitting jacket; worn during the Renaissance
<noun.artifact>

Doublet \Doub"let\, n. [In sense 3, OF. doublet; in sense 4, F.
doublet, dim. of double double. See {Double}, a.]
1. Two of the same kind; a pair; a couple.

2. (Print.) A word or words unintentionally doubled or set up
a second time.

3. A close-fitting garment for men, covering the body from
the neck to the waist or a little below. It was worn in
Western Europe from the 15th to the 17th century.

4. (Lapidary Work) A counterfeit gem, composed of two pieces
of crystal, with a color them, and thus giving the
appearance of a naturally colored gem. Also, a piece of
paste or glass covered by a veneer of real stone.

5. (Opt.) An arrangement of two lenses for a microscope,
designed to correct spherical aberration and chromatic
dispersion, thus rendering the image of an object more
clear and distinct. --W. H. Wollaston.

6. pl. (See No. 1.) Two dice, each of which, when thrown, has
the same number of spots on the face lying uppermost; as,
to throw doublets.

7. pl. [Cf. Pr. doblier, dobler draughtboard.] A game
somewhat like backgammon. --Halliwell.

8. One of two or more words in the same language derived by
different courses from the same original from; as, crypt
and grot are doublets; also, guard and ward; yard and
garden; abridge and abbreviate, etc.