Lewis & Short

rūmĭnor, āri, v. dep. a., and (after the Aug. period) rūmĭno, āre, v. n. and a. [rumen], to chew over again, chew the cud, to ruminate.

  1. I. Lit.
          1. (α) Neutr.: bos ruminat, Col. 6, 6, 1; Plin. 11, 37, 61, § 160; 9, 17, 29, § 62 al.; Vulg. Lev. 11, 26.
          2. (β) Act.: (bos) ruminat herbas, Verg. E. 6, 54; cf.: revocatas herbas, Ov. Am. 3, 5, 17: epastas herbas, id. Hal. 119: escas gutture, Paul. Nol. Carm. 18, 340.
  2. II. Trop., to think over, to muse or ruminate upon (only anteand post-class.; but cf. ruminatio): nemo haec ruminetur mulieri, Liv. Andron. ap. Non. 166, 29: ruminabitur humanitatem, Varr. ap. Non. 166, 27: Odyssean Homeri ruminari incipis, id. ib. 480, 24: ruminaris antiquitates, id. ib. 480, 23: dum carmina tua ruminas, Symm. Ep. 3, 13 fin.