/euh mig"deuh loyd'/, n. Petrol.
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.
adj. Also, amygdaloidal.
2. (of rocks) containing amygdules.
3. almond-shaped.
4. Anat. of or pertaining to an amygdala.
[1785-95; < L amygdal(a) ALMOND + -OID]

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  • amygdaloid — [ə mig′də loid΄] n. [ AMYGDAL(A) + OID] igneous rock containing amygdules adj. 1. almond shaped 2. of or like amygdaloid; containing amygdules …   English World dictionary

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  • Amygdaloid — Amygdaloid, derived from the Latin for almond, can refer to: * the amygdala in the brain. * any almond shape * (as amygdaloidal ) a volcanic rock texture in which small volatile cavities or vesicles are filled with secondary minerals …   Wikipedia

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