"doubler" in the noun sense

1. doubler

an electronic device that doubles the voltage or the frequency of an input signal

"doubler" in the adjective sense

1. double, dual, twofold, two-fold, treble, threefold, three-fold

having more than one decidedly dissimilar aspects or qualities public preaching and private influence"- R.W.Emerson

"a double (or dual) role for an actor"

"the office of a clergyman is twofold

"every episode has its double and treble meaning"-Frederick Harrison

2. double, dual, duple

consisting of or involving two parts or components usually in pairs

"an egg with a double yolk"

"a double (binary) star"

"double doors"

"dual controls for pilot and copilot"

"duple (or double) time consists of two (or a multiple of two) beats to a measure"

3. double, doubled, twofold, two-fold

twice as great or many

"ate a double portion"

"the dose is doubled"

"a twofold increase"

4. double

used of flowers having more than the usual number of petals in crowded or overlapping arrangements

"double chrysanthemums have many rows of petals and are usually spherical or hemispherical"

5. bivalent, double

used of homologous chromosomes associated in pairs in synapsis

6. double

large enough for two

"a double bed"

"a double room"

7. double, forked

having two meanings with intent to deceive

"a sly double meaning"

"spoke with forked tongue"

Source: WordNet® (An amazing lexical database of English)

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