Iota

1. (n.) A very small amount; also the ninth letter of the Greek alphabet corresponding with the English i.

2. (n.) A very small quantity or degree; a jot; a particle.

Thesaurus Entries

ace, atom, bit, crumb, dab, dole, dot, dram, dribble, driblet, drop, droplet, dwarf, farthing, fleck, flyspeck, fragment, gnat, gobbet, grain, granule, groat, hair, handful, jot, little, little bit, microbe, microorganism, midge, minim, minimum, minutia, minutiae, mite, modicum, molecule, mote, nutshell, ounce, particle, pebble, pinch, pinhead, pinpoint, pittance, point, ray, scrap, scruple, smidgen, smitch, snip, snippet, speck, spoonful, spot, thimbleful, tiny bit, tittle, trifling amount, trivia, vanishing point, whit