The Collaborative International Dictionary of English v.0.48:
Scintilla \Scin*til"la\, n. [L.] A spark; the least particle; an iota; a tittle. --R. North. [1913 Webster]WordNet (r) 3.0 (2006):
scintilla n 1: a tiny or scarcely detectable amount [syn: shred, scintilla, whit, iota, tittle, smidgen, smidgeon, smidgin, smidge] 2: a sparkling glittering particle