flap gate

Fetched 2026-10-26 (cache).

Synonyms: flat rate, slapgate, flux gate

Antonyms: flat rate, slapgate, flux gate

Related words from Datamuse; suggestions, not definitions.

Noun

1. A device that allows [[water]] to flow in one direction only through a [[culvert]]; it is used especially to drain surface water from coastal marshes at low tide

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.