Lewis & Short

rūmĭnātĭo, ōnis,f. [ruminor], a chewing over again, chewing the cud, rumination.

  1. I. Lit.: animalium, Plin. 11, 37, 79, § 201; Serv. Verg. E. 6, 54.
    1. B. Transf., a doubling; a repetition, return: corticis, Plin. 15, 23, 25, § 94: hiemis, id. 17, 22, 35, § 191.
  2. * II. Trop., a thinking over, revolving in the mind, ruminating, rumination: cotidiana, Cic. Att. 2, 12, 2.