boric acid

noun
1.
Also called orthoboric acid. Chemistry, Pharmacology. a white, crystalline acid, H 3 BO 3 , occurring in nature or prepared from borax: used chiefly in the manufacture of ceramics, cements, glass, and enamels, for fireproofing, and in medicine in aqueous solution as a mild antiseptic.
2.
Chemistry. any of a group of acids containing boron.

Origin:
1865–70

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Collins
World English Dictionary
boric acid
 
n
1.  Also called: orthoboric acid, Systematic name: trioxoboric(III) acid a white soluble weakly acid crystalline solid used in the manufacture of heat-resistant glass and porcelain enamels, as a fireproofing material, and as a mild antiseptic. Formula: H3BO3
2.  any other acid containing boron

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00:10
Boric acid is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
American Heritage
Medical Dictionary

boric acid bo·ric acid (bôr'ĭk)
n.
A water-soluble white or colorless crystalline compound used as an antiseptic and preservative.

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
boric acid   (bôr'ĭk)  Pronunciation Key 
A white or colorless crystalline compound that occurs naturally or is produced artificially from borax. It is used as an antiseptic and preservative, and in cements, enamels, and cosmetics. Chemical formula: H3BO3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Knowledge of effects of boric acid corrosion and susceptible penetrations on
  the reactor vessel head.
Boric acid should be reconsidered as a control for fire ants.
Boric acid is a strong neutron absorber which will help prevent the nuclear
  fuel from overheating.
Boric acid purchased on the world market was being used to feed the
  purified-grade boric-acid facility.
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