
A form of an element that has isotopic abundances that are different from the naturally occuring form. For example, 'depleted' uranium has had most of the uranium-235 removed, and is an allobar of natural uranium.
Found on
http://antoine.frostburg.edu/chem/senese/101/glossary/a.shtml

allobar 1. A form of a chemical element having an atomic weight different from that of the naturally occurring form. 2. An isotope with a different atomic weight than the naturally occurring form of the same element.
Found on
http://www.wordinfo.info/words/index/info/view_unit/84/

A form of an element that has isotopic abundances that are different from the naturally occuring form. For example, 'depleted' uranium has had most of the uranium-235 removed, and is an allobar of natural uranium.
Found on
https://www.encyclo.co.uk/local/20687
No exact match found.