dredgerOur editors are putting together more complete content — check back in about 20 minutesdredgerdredger — noun名詞1. a boat or machine used to remove mud, sand, or silt from the bottom of a river, 1.名詞釋義a boat or machine used to remove mud, sand, or silt from the bottom of a river, harbor, etc.例句The dredger cleared the channel for large ships.