Lewis Short
(adjective) : pĕtīlus, a, um
* Thin, slender (anteclass.): petilum tenue et exile,Non. 149, 7 sq.; Lucil. and Plaut. ap. Non. 1. 1.: petilam suram, siccam et substrictam vulgo interpretantur: Scaevola ait, ungulam albam equi ita dici,Fest. p. 205 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary