What does "aboideau" mean?

A tide gate, designed to protect marshland, so constructed as to let out water at low tide, but to prevent an influx of water at high tide.

What is a synonym for "aboideau"?

Common synonyms include: air lock, floodgate, gate, lock, penstock, sluice.

/ɑ.bwɑ.doʊ/ noun

noun ·Rare ·Advanced level

Noun

1
A tide gate, designed to protect marshland, so constructed as to let out water at low tide, but to prevent an influx of water at high tide. Canada

Borrowed from Acadian French aboideau.