Lewis Short
măcesco, ĕre
* V. inch. n. [maceo], to grow lean or thin, to become meagre (anteand post-Aug.): (apes) propter laborem asperantur et macescunt,Varr. R. R. 3, 16; 1, 55, 1: constat, arva segetibus ejus (hordei) macescere,become poor,Col. 2, 9, 14: feminis bubus demitur (cibus), quod macescentes melius concipere dicuntur,Varr. R. R. 2, 1, 17: tuo maerore maceror, Macesco, consenesco et tabesco miser,Plaut. Capt. 1, 2, 31.
Charlton T. Lewis, Charles Short, A Latin Dictionary