amygdule[ə mig′do̵̅o̅l′, -dyo̵̅o̅l′]
amygdule definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a small gas pocket, usually found in volcanic rock, partly or completely filled with a mineral, esp. a zeolite, calcite, or quartz
sometimes called amygdale
Origin: ; from Classical Latin amygdala, almond: from the typical shape
amygdule definition by American Heritage Dictionary
A small gas bubble in igneous, especially volcanic, rock filled with secondary minerals such as zeolite, calcite, or quartz.
Origin: Latin amygdala, almond (from its shape); see amygdala + (nod)ule.