Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sescuplus (sesquiplus, in vett. edd. Plin. 2, 22, 20, § 84, where, however, the best MSS. have sescuplus), a, um, adj. [sesqui], taken once and a half, once and a half as much: ut tempora tria ad duo relata sescuplum faciant, Quint. 9, 4, 47; so Plin. 1. 1.: tempus, Ter. Maur. Syll. pp. 2395 and 2412 P.: ratio, Censor. de Die Nat. 1.