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| phylum of worms comprised of parasitic and free-living nonparasitic species |
| cold-blooded vertebrate such as turtles, snakes, lizards, crocodilians, amphisbaenians and tuatara |
| Main Entry: | crepuscular1 |
| Part of Speech: | adj |
| Definition: | pertaining to twilight, esp. in dimness |
| Etymology: | Latin crepusculum |
| Main Entry: | crepuscular2 |
| Part of Speech: | adj |
| Definition: | appearing or active at twilight |
| Etymology: | Latin crepusculum |
| Usage: | zoology |