septic tank

[ sep-tik tangk ]

noun

1. a tank, often underground, in which organic sewage is decomposed and purified by anaerobic bacteria.

septic tank

noun

1. a tank, usually below ground, for containing sewage to be decomposed by anaerobic bacteria

Word History and Origins

Origin of septic tank¹

First recorded in 1900–05

Related Words

• cesspool
• sewer