A South American dolphin, Inia geoffrensis, that inhabits the Amazon and Orinoco rivers and fluctuates in color from bright pink to gray, depending on age and environmental factors such as sunlight, water temperature, and stress. Also called boto.
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 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved. Read more |
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