decadescent,a.nonce-wd.|dɛkəˈdɛsənt| [f. assumed L. type decadescere, inceptive from med.L. or Romanic decadēre: see decadence and -escent.] Beginning or tending to decay. 1858National Rev. Oct. 351 Those perils of matrimony over which decadescent virgins sigh so affectingly.