Lewis & Short

singultĭo, īre, v. n. [singultus].

  1. I. To hiccup: aut bilem vomunt aut singultiunt, Cels. 5, 26, 19; Plin. 23, 1, 24, § 48; to sob, App. M. 3, p. 133, 40.
    1. * B. Transf., of a hen, to cluck, Col. 8, 11, 15.
  2. * II. Transf., to throb with pleasure: vena, Pers. 6, 72.