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tet•ra•pod



Pronunciation: (te'tru-pod"), [key]
—n.
1. any vertebrate having four limbs or, as in the snake and whale, having had four-limbed ancestors.
2. an object, as a caltrop, having four projections radiating from one central node, with each forming an angle of 120° with any other, so that no matter how the object is placed on a relatively flat surface, three of the projections will form a supporting tripod and the fourth will point directly upward.

—adj.
having four limbs or descended from four-limbed ancestors.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

tetraploidtetrapody
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