proper name of a cross-slot screw and corresponding screwdriver, 1935, named for its inventor, U.S. businessman Henry F. Phillips (1890-1958) of Portland, Oregon. It was designed for car makers, hence the handyman's complaint that they are difficult to un-screw. Phillips lost the patent in 1949.
Mesopotamian river, arising in Armenia and flowing to the Persian Gulf, Old English Eufrate, from Greek Euphrates, from Old Persian Ufratu, perhaps from Avestan huperethuua "good to cross over," from hu- "good" + peretu- "ford" (from PIE root *per- (2) "to lead, pass over"). But Kent says "probably a popular etymologizing in O.P. of a local non-Iranian name" ["Old Persian," p.176]. In Akkadian, purattu. Related: Euphratean.
in the figurative phrase cross (or pass) the Rubicon "take a decisive step," 1620s, a reference to a small stream to the Adriatic on the coast of northern Italy which in ancient times formed part of the southern boundary of Cisalpine Gaul. It was crossed by Caesar, Jan. 10, 49 B.C.E., when he left his province to attack Pompey. The name is from Latin rubicundus "ruddy," in reference to the color of the soil on its banks.