masc. proper name, biblical patriarch, from Hebrew Noach, literally "rest." Phrase Noah's ark in reference to the ark in which, according to Genesis, Noah saved his family and many animals, is attested from 1610s. As a child's toy representing Noah's ark, by 1841.
The adjective Noachian, in reference to the flood legend, is from 1670s, reflecting the Hebrew pronunciation. Noachical is from 1660s; Noachic from 1773.
ancient Greek colony in Libya; the name is of unknown origin. Cyrenaic (1640s) typically refers to the philosophy ("practical hedonism") of Aristippus of Cyrene (c. 435-c. 356 B.C.E.); as a noun, "a Cyrenaic philosopher," from 1580s.
According to Aristippus, pleasure is the only rational aim, and the relative values of different pleasures are to be determined by their relative intensities and durations. He maintained also that cognition is limited to sensation. [Century Dictionary]