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amygdaloid
[ uh-mig-duh-loid ]
noun
- 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
- (of rocks) containing amygdules.
- Anatomy. of or relating to an amygdala.
amygdaloid
/ əˈmɪɡdəˌlɔɪd /
noun
- a volcanic igneous rock containing amygdales
adjective
- having the shape of an almond
- See amygdaloidala less common form of amygdaloidal
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Word History and Origins
Origin of amygdaloid1
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Example Sentences
Chalcedony, apparently from amygdaloid of the trap formation, was also found at Port Warrender.
Quartz crystals, with chalcedony, from nodules in amygdaloid.
Purplish-brown epidote, with small nests or concretions of green epidote and quartz; forming a sort of amygdaloid.
Masses of the two former minerals were also found imbedded in amygdaloid and trap-rock, thus denoting the parent beds of rock.
It is found in connection with isolated blocks of amygdaloid, of primitive greenstone, and of petrosilex.
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