1. [n]  ancient Greek philosopher who found the Stoic school (circa 335-263 BC)
2. [n]  ancient Greek philosopher who formulated paradoxes that defended the belief that motion and change are illusory (circa 495-430 BC)

U Rochester 1978. Euclid with asynchronous message-passing. "Preliminary ZENO Language Description", J.E. Ball et al, SIGPLAN Notices 14(9):17-34 (Sep 1979).