Di·og·e·nes n. A Greek Cynic philosopher (412?-323 B. C.) who lived much in Athens and was distinguished for contempt of the common aims and conditions of life, and for sharp, caustic sayings.
 Diogenes' crab Zool., a species of terrestrial hermit crabs (Cenobita Diogenes), abundant in the West Indies and often destructive to crops.
 Diogenes' tub, the tub which the philosopher Diogenes is said to have carried about with him as his house, in which he lived.

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