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- isotope-mass spectrometry for pharmaceutical analysis
- isotope mineralogy
- isotope neutron source
- isotope peak
- isotope reservoir effect
- isotope salt effect
- isotope scrambling
- isotope separation
- isotope separation cascade theory
- isotope separation, nuclear separation
- isotope separation of lithium
- isotope separator
- isotope shift
- isotope side band
- isotope signature
- isotope stratigraphy
- isotope substitution
- isotope substitution technique
- isotope temperature
- isotope tracer
- isotope tracer logging
- isotope tracing mass spectrometry
- isotopic
- isotopic abundance
- isotopically labeled compound