(n.) A little grain or small particle; a pellet\.

ace atom bit breccia dab debris detritus dole dot dram dribble driblet dwarf farthing fleck flyspeck fragment gobbet grain granulet gravel grit groat hair handful iota jot little little bit minim minimum minutiae mite modicum molecule mote nutshell ounce particle pebble pinch pittance point sand scruple shingle smidgen smitch speck spoonful spot thimbleful tiny bit tittle trifling amount trivia whit