sesquĭ-plex, plĭcis, adj. [plico],
taken once and a half; once and a half as much : sesquiplex aut duplex aut par, * Cic. Or. 57, 193; also sescuplex (cf. sescuplus), Quint. 9, 4, 47.
sēsquiplex plicis, adj.sesqui+PARC-, taken one and a half times, once and a half as much . ...
An Elementary Latin Dictionary