Definition of "amygdaloidal" [amygdaloidal]

• Shaped like an almond (adjective)
• Of, like or pertaining to, the amygdaloid mineral. (adjective)

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• "The part of the western shore where the land is highest shelters a small bay which might be made a tolerable harbour by means of two piers or quays erected on reefs of a kind of rock apparently very favourable for the purpose, namely amygdaloidal trap in rounded boulders."
• "This hill consisted of amygdaloidal trap in nodules, the crevices being filled with crystals of sulphate of lime, and there were many round balls of ironstone, like marbles or round shot, strewed about."
• "I ascended one, and found it was capped with trap rock in amygdaloidal nodules."