Grade 8 molecules Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. the smallest unit of a substance that has all the properties of that substance. It is made up of a single atom or group of atoms. Example Sentence A polymer is composed of giant molecules. Synonyms particle; atom; bit; smallest part Antonyms largest part Hear It! Say It! Write It! molecules Switch to cursive Start Share with your friends:
