Lewis Short
confervesco, ferbui (cf. ferveo, and Prisc. p. 866 P.), 3
* V. inch. n. [conferveo], to begin to boil, to become heated, grow hot (perh. not ante-Aug.).
* In gen.
* Prop.: aër conclusus versando confervescit,Vitr. 5, 3; 2, 6, 4: granum, si tegulis subjaceat, confervescere,Plin. 18, 30, 73, § 302 al.
* In medic. lang., of broken limbs, to heal, grow together: si quando ossa non conferbuerunt,Cels. 8, 10, 7; cf. id. 8, 10, 1; 8, 8, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary