Lewis Short
(adv.adv.) : ŭter-lĭbet, utrălĭbet, utrumlĭbet
* Pron.
* Which of the two you please, whichsoever of the two (rare but class.): utrumlibet elige, alterum incredibile est, alterum nefarium et ante hoc tempus utrumque inauditum,Cic. Quint. 26, 81.
* Indef., either one (of two), either of the two: eos consules esse, quorum utrolibet duce bellum Etruscum geri recte possit,Liv. 10, 24, 17: quae non dicere, si utrum libet esset liberum, maluissemus,Quint. 11, 1, 60; cf. id. 9, 1, 7: fingamus utrumlibet non recte dictum,id. 1, 5, 35; cf. id. 5, 10, 70; 6, 4, 18: si parti utrilibet omnino alteram detrahas,id. 2, 19, 2: ubi utrolibet modo curatum est,Cels. 6, 18, 10: adjecto vel irino vel laureo oleo, sic ut utrilibet paulum aceti misceatur,id. 6, 7, 7: sanguinem fluentem ex utrālibet parte sistit,Plin. 24, 4, 8, § 13: in utramlibet partem,Scrib. Comp. 101: 255.—Hence
* Ŭtrālĭbet, adv., on whichever of two sides, on either side, Plin. 2, 18, 16, § 79.
* Ŭtrōlĭbet, adv., to either one of two sides, to either side: ne inclinata utrolibet cervix,Quint. 1, 11, 9.
Charlton T. Lewis, Charles Short, A Latin Dictionary