Longman Dictionary of Contemporary English homepage

Date: 1900-2000
Origin: iso- + Greek topos 'place'

isotope

 noun
     
Related topics: Elements
i‧so‧tope [countable] technical
HCE one of the possible different forms of an atom of a particular element (=simple chemical substance)
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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