ray

ray definition - medical

ray (rā)

noun
  1. A narrow beam of light or other electromagnetic radiation.
  2. A narrow beam of particles, as a cathode.
  3. A structure or part having the form of a straight line extending from a point.
Ray definition - medical

Ray, John 1627-1705.

English naturalist who was the first to use anatomy to distinguish between specific plants and animals. He established the species as the basic classification of living things.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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