ISOTOPE

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 Dictionary entry overview: What does isotope mean? 

• ISOTOPE (noun)
  The noun ISOTOPE has 1 sense:

1. one of two or more atoms with the same atomic number but with different numbers of neutrons

  Familiarity information: ISOTOPE used as a noun is very rare.

 Dictionary entry details 

• ISOTOPE (noun)

Sense 1

Meaning:

One of two or more atoms with the same atomic number but with different numbers of neutrons

Classified under:

Nouns denoting substances

Hypernyms ("isotope" is a kind of...):

atom ((physics and chemistry) the smallest component of an element having the chemical properties of the element)

Hyponyms (each of the following is a kind of "isotope"):

radioisotope (a radioactive isotope of an element; produced either naturally or artificially)

deuterium; heavy hydrogen (an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen))

Derivation:

isotopic (of or relating to or having the relation of an isotope)

 Context examples 

Calcium-46 accumulation and turnover in bone can be measured with bone scintigraphy and urinary isotope excretion testing.

(Calcium-46 Chloride Aqueous Solution, NCI Thesaurus)

Calcium-41 accumulation and turnover in bone can be measured with bone scintigraphy and urinary isotope excretion.

(Calcium-41 Chloride Aqueous Solution, NCI Thesaurus)

How to explain that decrease in heavy isotopes over time?

(Scientists determine early Earth was a ‘water world’ by studying exposed ocean crust, National Science Foundation)

The ratio of the stable isotopes carbon-13 and carbon-12, reported in parts per thousand.

(Delta13C, NCI Thesaurus)

Previous identifications of this isotope have come from the detection of gamma rays, but their precise origin had been unknown.

(Stellar Corpse Reveals Origin of Radioactive Molecules, ESO)

A radioconjugate comprised of the orally available reversible 20S proteasome inhibitor ixazomib and labeled with the isotope carbon C 14.

(Carbon C 14-labeled Ixazomib, NCI Thesaurus)

The hydrochloride salt form of the quinazoline derivative erlotinib labeled with the positron-emitting isotope carbon C 11, with potential use in imaging.

(Carbon C 11 Erlotinib Hydrochloride, NCI Thesaurus)

The sodium salt form of the medium-chain fatty acid octanoate, and labeled with the isotope carbon C13, used in the octanoate breath test (OBT) to assess hepatic mitochondrial function.

(Carbon C 13 Sodium Octanoate, NCI Thesaurus)

A radioconjugate composed of the platinum agent oxaliplatin labeled with the isotope carbon C 14, that can be used to predict the response to oxaliplatin therapy using accelerator mass spectrometry (AMS).

(Carbon C 14 Oxaliplatin, NCI Thesaurus)

A radioactive isotope of phosphorus with beta particle-emitting radiocytotoxic activity.

(Phosphorus P-32, NCI Thesaurus)