A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, esp. agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava.
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of Round
Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.
of Round
Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.
Almond-shaped.
Open English WordNet places these words in at least one shared synset. They share a lexicalised sense, but context, register and collocation should still be checked before substitution.
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