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bronchoconstrictor

(brŏng′kō-kən-strĭktər)
n.
  1. An agent that causes a reduction in the caliber of a bronchus or bronchial tube.
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Related formsbron•cho•con•stric•tion (-shən) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.