Amygdaloid Definition

ə-mĭgdə-loid
amygdaloidal
noun
A volcanic rock containing many amygdules.
American Heritage
Igneous rock containing amygdules.
Webster's New World

A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, especially agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava.

Wiktionary
adjective
Almond-shaped.
Webster's New World
Of or relating to the amygdala.
American Heritage
Of or like amygdaloid; containing amygdules.
Webster's New World
Resembling a volcanic rock that contains many amygdules.
American Heritage
Shaped like an almond.
American Heritage Medicine
Synonyms:

Other Word Forms of Amygdaloid

Noun

Singular:
amygdaloid
Plural:
amygdaloids

Origin of Amygdaloid

  • From Ancient Greek ἀμυγδάλη (amugdalē, “almond”) +‎ -oid.

    From Wiktionary

  • Latin amygdala almond amygdala –oid

    From American Heritage Dictionary of the English Language, 5th Edition

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amygdaloid