Isosteres

Molecules or ions of similar size containing the same number of atoms and valence electrons.
Found on http://www.combichemistry.com/glossary_g.html

Isosteres

Isosteres are molecules or ions of similar size containing the same number of atoms and valence electrons, e.g., O2-, F-, Ne (See also Bioisostere).
Found on http://www.chem.qmul.ac.uk/iupac/medchem/ix.html

Isosteres

Molecules or ions of similar size containing the same number of atoms and valence electrons.
Found on http://www.combichemistry.com/glossary_g.html
No exact match found