early model harpsichord with only one string per note
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Spinet \Spin"et\, n. [OF. espinete, F. ['e]pinette (cf. It. spinetta), fr. L. spina a thorn; -- so called because its quills resemble thorns. See {Spine}.] (Mus.) A keyed instrument of music resembling a harpsichord, but smaller, with one string of brass or steel wire to each note, sounded by means of leather or quill plectrums or jacks. It was formerly much used.
{Dumb spinet}. (Mus.) See {Manichordon}.
Spinet \Spi"net\, n. [L. spinetum. See {Spinny}.] A spinny. [Obs.] --B. Jonson.