pink river dolphin

noun
variants: or pink dolphin

Definition of pink river dolphin 

: boto Somewhere up the Amazon, a big pink river dolphin breaches the surface with a pneumatic venting of its blowhole, then glides off humpy and slow through the placid brown water.— Richard Conniff, National Geographic, September 1996 Our skiff is backed up to a banana tree in the flooded Amazon River basin of Peru on this warm and sunny morning, and pink dolphins are putting on a show a few feet in front of us.— Terri Colby, Chicago Tribune, 22 July 2012

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First Known Use of pink river dolphin

1966, in the meaning defined above

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