effluvium

1. A usually invisible emanation or exhalation, as of vapor or gas.
2. 1. A byproduct or residue; waste.
   2. The odorous fumes given off by waste or decaying matter.
3. An impalpable emanation; an aura.

[Latin, from effluere, to flow out. See effluent.]

1. A shedding, especially of hair.
2. An exhalation, especially one of bad odor or injurious influence. No longer in technical use.

Pl. effluvia [L.]
1. an outflowing or shedding, as of the hair.
2. an exhalation or emanation, especially one of noxious nature.

• anagen e. — see anagen defluxion.

The noun has one meaning:

Meaning #1: a foul-smelling outflow or vapor (especially a gaseous waste)