| raptorial | <ornithology, zoology> Rapacious; living upon prey; said especially of certain birds. Adapted for seizing prey; said of the legs, claws, etc, of insects, birds, and other animals. Of or pertaining to the Raptores. Source: Websters Dictionary (01 Mar 1998) |
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| raptorious | <zoology> Raptorial. Origin: L. Raptorius. Source: Websters Dictionary (01 Mar 1998) |
| rapture of the deep | See: nitrogen narcosis. (05 Mar 2000) |