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Definition of para-aminobenzoic acid - 5 dictionary results

par⋅a-a⋅mi⋅no⋅ben⋅zo⋅ic ac⋅id

[par-uh-uh-mee-noh-ben-zoh-ik, -am-uh-noh-]

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–noun Chemistry, Biochemistry.

part of the folic acid molecule, a white or yellowish, crystalline, slightly water-soluble solid, C₇H₇NO₂, the para isomer of aminobenzoic acid: used chiefly in the manufacture of dyes and pharmaceuticals and in sunscreens to protect against ultraviolet light. Abbreviation: PABA

Origin:
1905–10; para- ¹ + amino- + benzoic acid

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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par·a-a·mi·no·ben·zo·ic acid (pār'ə-ə-mē'nō-běn-zō'ĭk, -ām'ə-)

n. PABA.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: para–ami·no·ben·zo·ic acid
Pronunciation: 'par-&-&-"mE-nO-"ben-"zO-ik-, 'par-&-"am-&-(")nO-
Function:noun
: a colorless para-substituted aminobenzoic acid that is a growth factor of the vitamin B complex called also PABA

Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

para-aminobenzoic acid par·a-a·mi·no·ben·zo·ic acid (pār'ə-ə-mē'nō-běn-zō'ĭk, -ām'ə-)
n.
PABA.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia

para-aminobenzoic acid

a vitamin-like substance and a growth factor required by several types of microorganisms. In bacteria, PABA is used in the synthesis of the vitamin folic acid. The drug sulfanilamide is effective in treating some bacterial diseases because it prevents the bacterial utilization of PABA in the synthesis of folic acid.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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