term,name,definition,category,provenance,provenance_uri,note oxygen_18_StableIsotopeRatioDelta,"Oxygen-18, stable isotope ratio delta",Difference in the 18O:16O ratio between the sample and standard,,Originally from the CUAHSI HIS VariableNameCV. See: http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=VariableNameCV.,,