duplicate — Defs

01 a. Double; twofold.

1.
Double; twofold.

Phrases & compounds

Duplicate proportion — 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.

02 n. That which exactly resembles or corresponds to something else; another, correspondent to the first; hence, a copy; a transcript; a counterpart.

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.
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.(Law)

03 v. t. To double; to fold; to render double.

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.
3.
To divide into two by natural growth or spontaneous action; as, infusoria duplicate themselves.(Biol.)