competitive inhibition

n.

Blockage of the action of an enzyme on its substrate by replacement of the substrate with a similar but inactive compound that can combine with the active site of the enzyme but that is not acted upon or split by the enzyme.selective inhibition

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