A filamentous colony of bacteria (e.g. Sphaerotilus natans) and fungi (e.g. Fusarium aqueductum), protozoa and other species, which may be found adhered on surfaces in sewage treatment plants or in natural waters as a result of the discharge of incompletely treated waste water.

(urban planning, derogatory) A place made unfriendly or dangerous to non-drivers by cars and car infrastructure.

plural of sewer fly

Any of the family Psychodidae of true flies, sometimes found in plumbing drains and sewage systems.

(UK, slang, archaic) A communal session of drinking alcohol.

Obsolete form of Sivalik Hills.

(sumo) A retired wrestler who assists at a stable

plural of sewan

Alternative form of seawan