granule - Dictionary definition and pronunciation - Yahoo! Education
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gran·ule  audio  (grnyl) KEY 

NOUN:
  1. A small grain or pellet; a particle.
  2. Geology A rock or mineral fragment larger than a sand grain and smaller than a pebble, between 2 and 4 millimeters in diameter.
  3. Astronomy One of the small, transient, brilliant markings in the photosphere of the sun.
  4. Biology A cellular or cytoplasmic particle, especially one that stains readily.
ETYMOLOGY:
Late Latin grnulum diminutive of Latin grnum, grain; see g-no- in Indo-European roots


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