Duplicatio, onis, f. g. Verbale. Sen. A doubling.Duplares.Men of armes, or Souldioures that had double alow ance.Duplaris numerus.A number doubled.
Lewis and Short: Latin dictionary
dūplĭcātĭo, ōnis, f. [duplico], a doubling (post-Aug.): radiorum, i. e.
reflection
, Sen. Q. N. 4, 8; Dig. 9, 4, 31: temporis, ib. 48, 19, 8.—II. Esp., (a). As arithm. t. t., a doubling, multiplication by two, Mart. Cap. 7, 750.—(b). As jurid. t. t., the answering of one objection by another, turning an objection upon an adversary, Gai. 4, 127.—(g). As rhet. fig., = a)nadi/plwsis, the repetition of a word in beginning a clause, Ruf. Schem. Lex. 8.