As nouns the difference between amygdaloid and api

is that amygdaloid is a variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, especially agates, quartz, calcite, and the zeolites when the imbedded minerals are detached or removed by decomposition, it is porous, like lava while api is .

As an adjective amygdaloid

is shaped like an almond.