The Collaborative International Dictionary of English v.0.48:
Mandolin \Man"do*lin\, Mandoline \Man"do*line\, n. [F. mandoline, It. mandolino, dim. of mandola, fr. L. pandura. See Bandore.] (Mus.) A small and beautifully shaped instrument resembling the lute. [1913 Webster]WordNet (r) 3.0 (2006):
mandolin n 1: a stringed instrument related to the lute, usually played with a plectrum