Definition of non-isotopic in US English:

non-isotopic

adjective

Chemistry
  • Not containing, involving, or of the nature of a distinctive or special isotope.

Origin

1920s (in an earlier sense). From non- + isotopic.

Pronunciation

non-isotopic

/ˌnɒnʌɪsə(ʊ)ˈtɒpɪk/