having, reduced to, consisting of, or bearing grain or grains (usually used in combination): fine-grained sand; large-grained rice.
having a granular form, structure, or surface: wood and other grained materials.
having an artificially produced granular texture or pattern: grained kid.
marked by a particular quality (usually used in combination): tough-grained journalism.

1520–30; grain + -ed3

grainedness [greynd-nis, grey-nid-] , noun
nongrained, adjective
ungrained, adjective
well-grained, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin & History

c.1200, from O.Fr. grein, from L. granum "seed" (see corn). As collective sing. meaning "seed of wheat and allied grasses used as food," it is attested from early 14c. Extended in M.E. to other objects (e.g. salt, sand). Used of wood (1560s), from the arrangement of fibers,
which resemble seeds. Hence, against the grain (1650), a metaphor from carpentry: cutting across the fibers of the wood is more difficult than cutting along them.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

grain (grān)

  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 U.S. Customary System, an avoirdupois unit equal to 0.002286 ounce (0.065 gram).

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
grain   (grān)  Pronunciation Key 
  1. See caryopsis.

  2. A small particle of something, such as salt, pollen, or sand.

  3. A unit of weight in the US Customary System, equal to 2/1000 of an ounce (0.07 gram). See Table at measurement.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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