grain

grain definition - medical

grain (grān)

noun
  1. A small, dry, one-seeded fruit of a cereal grass, having the fruit and the seed walls united.
  2. The fruits of cereal grasses especially after having been harvested, considered as a group.
  3. A relatively small discrete particulate or crystalline mass.
  4. Abbr. gr. A unit of weight in the US Customary System, an avoirdupois unit equal to 0.002286 ounce (0.065 gram).

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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