As nouns the difference between terms and allobar
is that terms is while allobar is (physics) any form of an element having a different isotopic composition to that of the natural element, and thus a different atomic weight.
terms
English
Noun
(head)
Statistics
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allobar
English
Noun
(
en noun)
(physics) Any form of an element having a different isotopic composition to that of the natural element, and thus a different atomic weight