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botryoidal

[bo-tree-oid-l] /ˌbɒ triˈɔɪd l/
adjective, Mineralogy
1.
having the form of a bunch of grapes:
botryoidal hematite.
Also, botryoid, botryose.
Origin
1810-1820
1810-20; < Greek botryoeid(ḗs) shaped like a bunch of grapes (bótry(s) bunch of grapes + -oeidēs -oid) + -al1
Related forms
botryoidally, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for botryoid

botryoidal

/ˌbɒtrɪˈɔɪdəl/
adjective
1.
(of minerals, parts of plants, etc) shaped like a bunch of grapes
Word Origin
C18: from Greek botruoeidēs, from botrus cluster of grapes; see -oid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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botryoid in Medicine

botryoid bot·ry·oid (bŏt'rē-oid')
adj.
Having numerous rounded protuberances resembling a bunch of grapes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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botryoid in Science
botryoidal
  (bŏt'rē-oid'l)   
Shaped like a bunch of grapes. Certain minerals and parts of organisms can be botryoidal.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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