Sewage that has been aerated and agitated in order to promote the growth of beneficial microorganisms that break down organic matter.

(physics) The drawing of a liquid (often against gravity) into or up narrow interstices due to surface tension

(physics, meteorology) The boundary between two different air masses, or a portion thereof, which produces appreciable cloudiness and precipitation and is usually accompanied by significant shifts in wind direction.

(chemistry) activated carbon

(chemistry) A very absorbent form of finely powdered carbon; used in purifying gases, and as an antidote for many poisons.

It is more effective to act directly than to speak of action. / A person’s actions indicate their true sentiments more reliably than their claims do.

(transitive) To make real; to realize. / (intransitive) To become actual or real. / (reflexive) To realize one's full potential.

An attack designed to prevent an enemy from attacking, or from moving its position

(military) A tactical subdivision of a larger area, the responsibility for which is assigned to a tactical unit; generally applied to offensive action.

(medicine, pathology, dermatology) A potentially precancerous skin lesion, typically on the upper portion of the head, characterized by discolored, thickened or scaly growths of keratin and caused by repeated exposure to ultraviolet light, such as from sunlight or tanning beds.