To boil or bubble up; to effervesce or foam.
From Latin 'ebullatus,' past participle of 'ebullare' (to boil over), from 'e-' (out) + 'bullare' (to bubble), derived from 'bulla' (bubble). The term entered English scientific vocabulary.
This word captures the exact moment a liquid transforms—the bubbles breaking the surface—and scientists still use it when describing chemical reactions under controlled conditions.
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