| double |
having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison increase twofold; "The population doubled within 50 years" 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" a base hit on which the batter stops safely at second base; "he hit a double to deep centerfield" hit a two-base hit twice as great or many; "ate a double portion"; "the dose is doubled"; "a twofold increase" 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" a stand-in for movie stars to perform dangerous stunts; "his first job in Hollywood was as a double for Clark Gable" double over: bend over or curl up, usually with laughter or pain; "He doubled and vomited violently" someone who closely resembles a famous person (especially an actor); "he could be Gingrich's double"; "she's the very image of her mother" do double duty; serve two purposes or have two functions; "She doubles as his wife and secretary" bivalent: used of homologous chromosomes associated in pairs in synapsis downward and forward; "he was bent double with pain" large enough for two; "a double bed"; "a double room" a quantity that is twice as great as another; "36 is the double of 18" bridge: make a demand for (a card or suit) two together; "some people sleep better double" doubly: to double the degree; "she was doubly rewarded"; "his eyes were double bright" doubling: raising the stakes in a card game by a factor of 2; "I decided his double was a bluff" duplicate: make or do or perform again; "He could never replicate his brilliant performance of the magic trick" having two meanings with intent to deceive; "a sly double meaning"; "spoke with forked tongue"
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| double bond |
a covalent bond in which two pairs of electrons are shared between two atoms
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| double chin |
a fold of fatty tissue under the chin
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| double decomposition |
a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB)
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| double pneumonia |
lobar pneumonia involving both lungs
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