The Collaborative International Dictionary
Amygdaloidal
Amygdaloid \A*myg"da*loid\, Amygdaloidal \A*myg`da*loid"al\, a.
Almond-shaped.
Pertaining to, or having the nature of, the rock amygdaloid.
Wiktionary
amygdaloidal
a. 1 Shaped like an almond 2 Of, like or pertaining to, the amygdaloid mineral.
WordNet
amygdaloidal
adj. shaped like an almond [syn: almond-shaped, amygdaliform, amygdaloid]
Usage examples of "amygdaloidal".
It is a common product of alteration in igneous rocks, and frequently occurs as well-developed crystals in association with zeolites lining the amygdaloidal cavities of basaltic and other rocks.