1. [ noun ] (physics and chemistry) the smallest component of an element having the chemical properties of the element
Related terms: substance hydrogen_atom ion free_radical monad carbon_atom isotope molecule chemical_element nucleus elementary_particle physics chemistry atomize atomize
2. [ noun ] (nontechnical usage) a tiny piece of anything
Synonyms: particle speck corpuscle mote molecule
Related terms: material grain chylomicron flyspeck atomize
Similar spelling:   ATM