polyatomic entity covalently connected entity molecule http://purl.bioontology.org/ontology/SNOMEDCT/290005005 http://purl.obolibrary.org/obo/CHEBI_25367 http://purl.obolibrary.org/obo/NCIT_C63816 https://en.wikipedia.org/wiki/Category:Molecules https://en.wikipedia.org/wiki/Molecule A molecule is the mereological maximal sum of a collection of covalently bonded atoms. An aggregate of two or more atoms in a defined arrangement held together by chemical bonds. Any polyatomic entity that is an electrically neutral entity consisting of more than one atom. molecules