Medical Dictionary

decay de·cay (dĭ-kā')

  1. The destruction or decomposition of organic matter as a result of bacterial or fungal action; rot.

  2. Dental caries.

  3. The loss of information that was registered by the senses and processed into the short-term memory system.

  4. Radioactive decay.

v. de·cayed, de·cay·ing, de·cays
  1. To break down into component parts; rot.

  2. To disintegrate or diminish by radioactive decay.

  3. To decline in health or vigor; waste away.

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