Gruppennachbar

== German == === Etymology === From Gruppe +‎ -n- +‎ Nachbar. === Noun === Gruppennachbar m (weak or mixed, genitive Gruppennachbarn or (less common) Gruppennachbars, plural Gruppennachbarn) (chemistry) group neighbour (in the periodic table) (rare) neighboring person within a group ==== Declension ====