You might be referring to atomos which means "that which cannot be divided." It is the root of the word atom.
μικρό (micro)
The Greek word for "Small" is "μικρό". Min, mini, micro etc.
Electrons is the subatomic particle that derived its name from the Greek word for a type of semiprecious stone.
The word is composite and the parts are definitely Greek. Micro means small and phone means voiceIn Greek, they are written as: μικρόφωνο
I believe it is micro but I am not sure...
μικρογραφία (transliterated mikrographia, pronounced micro-graph-ee-ah)
Micro is a prefix of Greek origin, meaning extremely small
Actually, "microscope" is a word of greek origin. The original one in greek is "μικροσκόπιο" (mee-kro-sko-pee-o)
micro μικρό ex. μικρό αγόρι : little boy
"Micro" means "small." "Scope" comes from a Greek word meaning "to look." So if you want to look at small things, use a microscope!
micro means small
Astronomy and astronaut have the root 'Astros' which means star.