Definition of "miosis" [miosis]

• Constriction of the pupil of the eye, resulting from a normal response to an increase in light or caused by certain drugs or pathological conditions. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A lot of new characters and situations to keep up with on Private Practice, as the practices divide like miosis."
• "Lomb Inc. The drug has two-thirds of the U.S. sales for the class of prescription drugs used to induce miosis, or constriction of the pupil."
• "DenverPost.com - Diane Carman:Quick: Define miosis and mitosis."