mănūmissĭo — Lewis & Short
mănūmissĭo, ōnis, f.manumitto,
in these three cases it was called justa manumissio. A fourth mode, which, however, was less valid, consisted in pronouncing the slave free before (five) friends, or inviting him to table, or by letter,Cic. Cael. 29, 69; Gai. Inst. 1, 17; Plin. Ep. 7, 16, 4; Val. Max. 2, 6, 7; Sen. Vit. Beat. 24, 3.—