Lewis & Short

istinc, adv. [istim-ce; cf. hinc, illinc], from there, thence, i. e. from the place of the person addressed, or a place related to that person.

  1. I. Lit., of place: istinc loquere, si quid vis: procul tamen audiam, Plaut. Capt. 3, 4, 71: serva istas fores, ne tibi clam se subterducat istinc. id. Mil. 3, 3, 72: age alter istinc, alter hinc adsistite, id. Rud. 3, 5, 28: istinc excludere, Ter. Hec. 3, 2, 4: qui istinc veniunt, Cic. Fam. 1, 10: emanare, id. Att. 7, 21, 1; Verg. A. 6, 389.
  2. II. Transf., thereof, i. e. of that thing: memento dimidium istinc mihi de praeda dare, Plaut. Ps. 4, 7, 68: neque ergo partem posco mihi istinc de istoc vidulo, id. Rud. 4, 4, 33.