activity

Medical Dictionary

activity ac·tiv·i·ty (āk-tĭv'ĭ-tē)
n.

  1. A physiological process.

  2. The presence of neurogenic electrical energy in electroencephalography..

  3. An ideal concentration for which the law of mass action will apply perfectly.

  4. The intensity of a radioactive source.

  5. The ability to take part in a chemical reaction.

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