Definition of "perspiration" []

• The fluid, consisting of water with small amounts of urea and salts, that is excreted through the pores of the skin by the sweat glands; sweat. (noun)
• The act or process of perspiring. (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.

• "In the ordinary state of the skin, even when there is no apparent perspiration, it is constantly exhaling waste matter, in a form which is called _insensible perspiration_, because it cannot be perceived by the senses."
• "Another part of it, when circulating through the skin, is passed off in the form of that watery vapor which we call perspiration, or sweat."
• "Your personal habits are stored, along with your dietary intake and vital signs, thanks to improvements in perspiration-reading sensors, wireless communications with menus, and heart-monitoring wristwatches."