Library / English Dictionary

ISOTOPE

Pronunciation (US):

(GB):

 I. (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)

Credits

 Context examples: 

We have used molybdenum isotopes to answer this question.

(Moon’s Formation Brought Water to Earth, The Titi Tudorancea Bulletin)

The two stable isotopes of oxygen are ¹⁶O and ¹⁸O.

(Oxygen isotopes, NOAA Paleoclimate Glossary)

Ethylcholine labeled with fluorine F 18, a positron-emitting isotope.

(Fluorine F 18 Fluoroethylcholine, NCI Thesaurus)

A radioconjugate consisting of EF5, a fluorinated derivative of etanidazole, conjugated to fluorine F 18, a positron emitting isotope.

(fluorine F 18 EF5, NCI Thesaurus)

The amino acid analog fluorodopa (FDOPA) labeled with fluorine F 18, a positron-emitting isotope, with potential tumor tracer property.

(Fluorine F 18 Fluorodopa, NCI Thesaurus)

A radiopharmaceutical consisting of a sulfonamide covalently attached to the positron-emitting isotope fluorine F 18 with CA-IX-binding and radioisotopic activities.

(Fluorine F 18-VM4-037, NCI Thesaurus)

When conjugated with a radioactive isotope, Lym-1 monoclonal antibody selectively transports the cytotoxic radioisotope to HLA-Dr10-expressing tumor cells, thereby sparing healthy B-cells and normal tissues.

(Monoclonal Antibody Lym-1, NCI Thesaurus)

An organic or inorganic substance, element, isotope, food or other materials derived from microorganism, plant, or animal sources.

(Drug, Food, Chemical or Biomedical Material, NCI Thesaurus)

These isotopes indicate the types of food consumed by the individual in the years leading up to their death.

(Analysis of the Palaeolithic diet finds that, in the prehistoric age, for thousands of years there were no social divisions in food consumption, University of Granada)

A radiopharmaceutical consisting of an estradiol analogue radiolabeled with the positron-emitting isotope fluorine F 18.

(F-18 16 alpha-fluoroestradiol, NCI Thesaurus)