amygdaloid

a·myg·da·loid

[uh-mig-duh-loid]
noun Petrology.
1.
a volcanic rock in which rounded cavities formed by the expansion of gas or steam have later become filled with deposits of various minerals.
adjective Also, a·myg·da·loi·dal.
2.
(of rocks) containing amygdules.
4.
Anatomy. of or pertaining to an amygdala.

Origin:
1785–95; < Latin amygdal(a) almond + -oid

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Amygdaloid is always a great word to know.
So is Achilles tendon. Does it mean:
the tendon joining the calf muscles to the heel bone
one member of the two lowest pairs of ribs, which are attached neither to the sternum nor to the cartilages of other ribs.
Collins
World English Dictionary
amygdaloid (əˈmɪɡdəˌlɔɪd) [Click for IPA pronunciation guide]
 
n
1.  a volcanic igneous rock containing amygdales
 
adj
2.  having the shape of an almond
3.  a less common form of amygdaloidal

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

amygdaloid a·myg·da·loid (ə-mĭg'də-loid') or a·myg·da·loi·dal (ə-mĭg'də-loid'l)
adj.

  1. Shaped like an almond.

  2. Of or relating to an amygdala.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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