- a volcanic rock in which rounded cavities formed by the expansion of gas or steam have later become filled with deposits of various minerals.
- (of rocks) containing amygdules.
- Anatomy. of or relating to an amygdala.
Origin of amygdaloid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for amygdaloidal
I ascended one, and found it was capped with trap rock in amygdaloidal nodules.
Occasionally we meet with igneous rocks which are more or less vesicular and amygdaloidal throughout their entire mass.Geology
It occurs in a series of amygdaloidal dolerites or diabases, and in the associated sandstones and conglomerates.
It may be traced for many miles, passing through the amygdaloidal and other traps of the hill called Normans Law.
They consist almost exclusively of greenstone, becoming, in a few instances, earthy and amygdaloidal.
- (of a volcanic rock) containing amygdales
- a less common form of amygdaloid (def. 2)
- a volcanic igneous rock containing amygdales
- having the shape of an almond
- a less common form of amygdaloidal (def. 1)
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
- Shaped like an almond.
- 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.