What is the meaning of Porpoise?
A small cetacean of the family Phocoenidae, related to dolphins and whales.
Any small dolphin.
Said of an air-breathing aquatic animal such as a porpoise or penguin: To repeatedly jump out of the water to take a breath and dive back in a continuous motion.
Said of an aircraft: to make a series of plunges when taking off or landing; or of a watercraft: to successively plunge up and down in the water.
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