The Collaborative International Dictionary of English v.0.48:
Monoplegia \Mon`ople"gi*a\, n. [NL., fr. Gr. mo`nos single + ? a stroke.] (Med.) Paralysis affecting a single limb. [1913 Webster]WordNet (r) 3.0 (2006):
monoplegia n 1: paralysis of a single limb