Lewis & Short

testāmentārĭus, a, um, adj. [testamentum], of or belonging to wills, testamentary.

  1. I. Adj.: (lex) Cornelia, Cic. Verr. 2, 1, 42, § 108: adoptio, by will, Plin. 35, 2, 2, § 8: hereditates, Dig. 50, 16, 130.
  2. II. Subst.: testā-mentārĭus, ii, m.
    1. A. Ingen., one who draws up a will: si testamentarius contra voluntatem testatoris condicionem detraxit. Dig. 28, 5, 9, §§ 3 and 6; 29, 6, 1; 36, 1, 3 fin.
    2. B. In a bad sense, one who forges a will, Cic. Sest. 17, 39; id. Off. 3, 18, 73.