Lewis & Short

călesco, ĕre, v. inch. n. [caleo], to grow warm or hot.

  1. I. Lit. (rare but class.): (vortex) suā cum Mobilitate calescit, Lucr. 6, 280: calescere vel apricatione vel igni, umbris aquisve refrigerari, Cic. Sen. 16, 57; id. N. D. 2, 55, 138: unda calescit, Ov. M. 15, 310; Curt. 4, 7, 22.
  2. II. Trop., of the mind, to become excited, to glow, be inflamed; esp. with love (poet.), Ter. Eun. 1, 2, 5 Don.: quo propius nunc es, flammā propiore calesco, Ov. H. 18, 177; so id. M. 3, 372: est deus in nobis! agitante calescimus illo, id. F. 6, 5.