Du"pli*cate (?), a. [L.
duplicatus, p. p. of duplicare to double, fr.
duplex double, twofold. See Duplex.] Double;
twofold.
Duplicate proportion or ratio
(Math.), the proportion or ratio of squares. Thus, in
geometrical proportion, the first term to the third is said to be in
a duplicate ratio of the first to the second, or as its square
is to the square of the second. Thus, in 2, 4, 8, 16, the ratio of 2
to 8 is a duplicate of that of 2 to 4, or as the square of 2
is to the square of 4.
Du"pli*cate (?), v. t. [imp. &
p. p. Duplicated (?); p. pr. & vb.
n. Duplicating.] 1. To double;
to fold; to render double.
2. To make a duplicate of (something); to
make a copy or transcript of. Glanvill.
3. (Biol.) To divide into two by
natural growth or spontaneous action; as, infusoria duplicate
themselves.
Du"pli*cate, n. 1.
That which exactly resembles or corresponds to something else;
another, correspondent to the first; hence, a copy; a transcript; a
counterpart.
I send a duplicate both of it and my last
dispatch.
Sir W. Temple.
2. (Law) An original instrument
repeated; a document which is the same as another in all essential
particulars, and differing from a mere copy in having all the
validity of an original. Burrill.