n. pl. ef·flu·vi·a (-vē-ə) or ef·flu·vi·ums 1. A usually invisible emanation or exhalation, as of vapor or gas. 2. a. A byproduct or residue; waste. b. The odorous fumes given off by waste or decaying matter. 3. An impalpable emanation; an aura. [Latin, from effluere, to flow out; see EFFLUENT.] ef·fluvi·al adj. |
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