amygdaloid

American  

[uh-mig-duh-loid] / əˈmɪg dəˌlɔɪd /

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.

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adjective

1. (of rocks) containing amygdules.

2. almond-shaped.

3. Anatomy. of or relating to an amygdala.

amygdaloid British  

/ əˈmɪɡdəˌlɔɪd /

noun

1. a volcanic igneous rock containing amygdales

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adjective

1. having the shape of an almond

2. a less common form of amygdaloidal

Etymology

Origin of amygdaloid

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

Example Sentences

See Examples For:

amygdaloid

“There was one subgroup of those that had a lot of amygdaloid and cingulate cortex type of activity, so they stood out.”

From Salon ● Mar. 9, 2014

If the masses of diorite and amygdaloid, which appear to us to be layers, are very large veins, they may be supposed to have been formed and upheaved simultaneously.

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 by Alexander von Humboldt

Pertaining to, or having the nature of, the rock amygdaloid.

From Webster's Unabridged Dictionary by Noah Webster

Excavated in the same amygdaloid rock, the temples and monasteries differ in aspect from those of Ajunta, on account of the form of the mountain.

From Scientific American Supplement, No. 643, April 28, 1888 by Various

The greyish blue amygdaloid contains fendilated crystals of pyroxene and mesotype.

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 by Alexander von Humboldt