ultrōnĕus, a, um, adj. [ultro],
of one's own accord , voluntary (late Lat.): exsilium, Ap. Met. 1, 19, 30; ultroneam te dominae tuae reddis (i. e. ultro, tuā sponte), voluntarily , id. ib. 6, 5, 11; cf. id. Flor. 2, p. 350, 10; Vulg. Exod. 25, 2 (but in Sen. Q. N. 2, 59, 8, the correct read. is nati).