See modicum in Webster's New World Roget's A-Z Thesaurus II
noun
A tiny amount:
bit1, crumb, dab1, dash, dot, dram, drop, fragment, grain, iota, jot, minim, mite, molecule, ort, ounce, particle, scrap1, scruple, shred, smidgen, speck, tittle, trifle, whit. (Chiefly British) spot. See big
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