What is to go under the surface of water and immediately reappear; to dive; to plunge the head in water or other liquid; to dip. In Tiber ducking thrice by break of day. Dryden called?

duck — To go under the surface of water and immediately reappear; to dive; to plunge the head in water or other liquid; to dip. In Tiber ducking thrice by break of day. Dryden. (Webster's 1913.)

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