[broh-mahyd or for 1, broh-mid]
a salt of hydrobromic acid consisting of two elements, one of which is bromine, as sodium bromide, NaBr.
a compound containing bromine, as methyl bromide.
Pharmacology. potassium bromide, known to produce central nervous system depression, formerly used as a sedative.
a platitude or trite saying.
a person who is platitudinous and boring.

1830–40; brom- + -ide; in defs. 3, 4 from use of some bromides as sedatives

subbromide, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bromide (ˈbrəʊmaɪd)
1.  any salt of hydrobromic acid, containing the monovalent ion Br-- (bromide ion)
2.  any compound containing a bromine atom, such as methyl bromide
3.  a dose of sodium or potassium bromide given as a sedative
4.  a.  a trite saying; platitude
 b.  a dull or boring person
[C19, C20 (cliché): from brom(ine) + -ide]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1836, from bromine, the pungent, poisonous element (1827), from Fr. brome, from Gk. bromos "stench." Used as a sedative; figurative sense of "dull, conventional person or trite saying" popularized by U.S. humorist Gelett Burgess (1866-1951) in his book "Are You a Bromide?" (1906). Related: Bromidic.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

bromide bro·mide (brō'mīd')

  1. A binary compound of bromine with another element, especially a salt containing monovalent negatively charged bromine.

  2. potassium bromide.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
bromide   (brō'mīd')  Pronunciation Key 
A compound, such as potassium bromide, containing bromine and another element or radical.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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