( geology ) The basin-like opening or mouth of a volcano, through which the chief eruption comes similarly, the mouth of a geyser, about which a cone of silica is often built up.( astronomy ) A hemispherical pit created by the impact of a meteorite or other object.First coined 1613, from Latin crātēr ( “ basin ” ), from Ancient Greek κρᾱτήρ ( krātḗr, “ mixing-bowl, wassail-bowl ” ).
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