plume

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plume

The concentration profile of an airborne or waterborne release of materials as it spreads from its source; an area of chemicals in a particular medium (e.g., air or groundwater), moving away from its source in a band or column, as of smoke from a chimney or chemicals moving with groundwater.

plume

(ploom)
A wisp or puff of smoke, esp. one that may rise from a surgical field in which electrocautery or lasers are used to cut, coagulate, or destroy tissue. Surgical plumes may contain carbon monoxide, among other potentially toxic gases.