flyspeck

nouns

a tiny dark speck made by the excrement of a fly
flyspeck
is a type of (narrower)
(nontechnical usage) a tiny piece of anything
atom, corpuscle, molecule, mote, particle, speck

adjectives

very small
"diminutive in stature"; "a lilliputian chest of drawers"; "her petite figure"; "tiny feet"; "the flyspeck nation of Bahrain moved toward democracy"
bantam, diminutive, flyspeck, lilliputian, midget, petite, tiny