isotope
Concise Oxford English Dictionary © 2008 Oxford University Press:
isotope /ˈʌɪsətəʊp/
▶noun Chemistry each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
– derivatives
isotopic adjective,
isotopically adverb,
isotopy noun /ʌɪˈsɒtəpi/.
isotopic adjective,
isotopically adverb,
isotopy noun /ʌɪˈsɒtəpi/.
– origin 1913: from iso- + Gk topos ‘place’ (because the isotopes occupy the same place in the periodic table).
'isotope' also found in these Oxford entries:
carbon-12
- carbon-14
- D
- depleted uranium
- deuterated
- deuterium
- enrich
- half-life
- heavy
- heavy water
- label
- light
- mass defect
- protium
- radiocarbon
- radio-element
- radioisotope
- spike
- T
- tritiated
- tritium
