Geology, Petrology. (of rocks) sandlike; sandy.
Botany. growing in sand.

1640–50; < Latin (h)arēnaceus. See arena, -aceous Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
arenaceous (ˌærɪˈneɪʃəs)
1.  argillaceous Compare rudaceous (of sedimentary rocks and deposits) composed of sand or sandstone
2.  (of plants) growing best in a sandy soil
[C17: from Latin harēnāceus sandy, from harēna sand]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
arenaceous   (ār'ə-nā'shəs)  Pronunciation Key 
  1. Resembling, derived from, or containing sand.

  2. Growing in sandy areas.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Consists mainly of fine-grained, dark gray arenaceous rock with well developed slaty cleavage.
Contains rare molds of small mollusks and arenaceous foraminifera.
Upper part characterized by rapid alternations of argillaceous and arenaceous layers and shallow water features.
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