accretion

Science Dictionary
accretion   (ə-krē'shən)  Pronunciation Key 
  1. Geology The gradual extension of land by natural forces, as in the addition of sand to a beach by ocean currents, or the extension of a floodplain through the deposition of sediments by repeated flooding.

  2. Astronomy The accumulation of additional mass in a celestial object by the drawing together of interstellar gas and surrounding objects by gravity.


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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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