molecule molecularly • molehead · · · Info · Definitions · Synonyms · Characters · · molecule · · Text Latin · · Script 8 · · Length Definitions · · · (noun) (physics and chemistry) the simplest structural unit of an element or compound. · · Noun Definition 1 (noun) (nontechnical usage) a tiny piece of anything. Synonyms: atom, particle, corpuscle, mote, speck. · · Noun Definition 2 Synonyms · · · atom · · Synonym 1 particle · · Synonym 2 corpuscle · · Synonym 3 mote · · Synonym 4 speck · · Synonym 5 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F u latin small letter u U+0075