aboideau
nounUS /ɑ.bwɑ.doʊ/
Etymology Borrowed from Acadian French aboideau.
1
Canada 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.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.