large, ferocious bird of fable, 1570s, from Arabic rukhkh, from Persian rukh. Mentioned in Marco Polo's account of Madagascar, modern use is mostly from "Arabian Nights." Hence roc's egg "something marvelous or prodigious."
Robinson Crusoe
robot
robotic
robotics
robust
roc
rock
rock and roll
rockabilly
rock-bottom
rock-candy