radiolabel
C2 - Very low frequency, specialized technical term.Formal, technical/scientific. Used almost exclusively in chemistry, biochemistry, pharmacology, molecular biology, and medical research contexts.
Definition
Meaning
To label or tag a molecule, substance, or biological entity with a radioactive isotope, allowing it to be traced, detected, or quantified in chemical, biological, or medical research.
The process or technique of using radioactive isotopes as tracers; the radioactive compound or atom itself that is used as the label. Also used as an adjective to describe something that has been tagged in this way (e.g., a radiolabeled protein).
Linguistics
Semantic Notes
Primarily a verb denoting a specific scientific procedure. The noun form ('a radiolabel') refers to the radioactive tag itself. The adjective ('radiolabeled'/'radiolabelled') describes the tagged substance. The concept is central to tracer studies, autoradiography, and metabolic pathway analysis.
Dialectal Variation
British vs American Usage
Differences
Spelling of derived forms: UK 'radiolabelling', 'radiolabelled'; US 'radiolabeling', 'radiolabeled'. No difference in core meaning or application.
Connotations
Identical technical connotations. Implies precision, experimental methodology, and often work with potentially hazardous materials requiring safety protocols.
Frequency
Equally low frequency in both dialects, confined to identical scientific fields.
Vocabulary
Collocations
Grammar
Valency Patterns
[SUBJ: Researcher/Team] + radiolabel + [OBJ: Molecule/Compound] + with + [OBL: Isotope (e.g., ³²P)][SUBJ: Technique] + allows + [OBJ: Compound] + to be + radiolabeled[SUBJ: Compound] + is + radiolabeled + for + [OBL: purpose (e.g., tracking)]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Follow the radioactive trail (related concept, not a direct idiom for the word itself)”
Usage
Context Usage
Business
Virtually never used. Might appear in highly specific contexts like pharmaceutical R&D reports or patents.
Academic
The primary domain. Used in research papers, methodology sections, theses, and lab protocols in life sciences and chemistry.
Everyday
Extremely rare. Would only be used by a scientist explaining their work in layman's terms.
Technical
The core context. Precise term in experimental protocols, safety documentation (e.g., 'Handling of radiolabeled materials'), and scientific equipment manuals (e.g., for scintillation counters).
Examples
By Part of Speech
verb
British English
- The team will radiolabel the amino acid with sulphur-35 to study protein synthesis.
- All materials radiolabelled in this facility must be logged in the register.
American English
- We need to radiolabel the antibody for the binding assay.
- The precursor was radiolabeled with carbon-14 for the uptake study.
adverb
British English
- Not commonly used as an adverb. 'Radioactively' is used instead (e.g., 'radioactively tagged').
American English
- Not commonly used as an adverb. 'Radioactively' is used instead (e.g., 'radioactively labeled').
adjective
British English
- The radiolabelled probe was injected into the tumour model.
- Handling procedures for radiolabelled compounds are strictly enforced.
American English
- They detected the signal from the radiolabeled DNA fragment.
- A radiolabeled metabolite was found in the urine samples.
Examples
By CEFR Level
- Scientists sometimes use radioactive atoms to 'label' or track molecules in the body; this is called radiolabeling.
- The drug's path was followed using a radiolabel.
- To elucidate the metabolic pathway, the researchers chose to radiolabel the glucose substrate with tritium (³H).
- Autoradiography requires the tissue sample to contain a radiolabeled compound that emits beta particles.
Learning
Memory Aids
Mnemonic
Imagine a scientist placing a tiny, glowing 'label' made of RADIOactivity onto a molecule to see where it goes.
Conceptual Metaphor
TAGGING FOR TRACKING. The radioactive atom is conceptualized as a tag or beacon attached to an otherwise invisible object to monitor its movement and fate.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque from 'радио' + 'метка'. The English term is a specific compound, not a descriptive phrase. The correct Russian equivalent is 'мечить радиоактивной меткой' or 'радиомечение'.
- Confusion with 'radio' as in broadcasting. Here 'radio-' refers solely to radioactivity.
Common Mistakes
- Using 'radiolabel' as a common synonym for 'tag' or 'label' in non-scientific contexts.
- Misspelling as 'radio label' (two words) in technical writing.
- Incorrect verb conjugation in past tense: 'radiolabeled' vs. 'radiolabelled' depending on dialect.
- Pronouncing it as /ˈreɪ.di.əʊ.læb.əl/ (like 'laboratory') instead of /ˈreɪ.di.əʊ.ˌleɪ.bəl/.
Practice
Quiz
In which context would the word 'radiolabel' be MOST appropriately used?
FAQ
Frequently Asked Questions
The word describes a technique. The danger depends entirely on the specific radioactive isotope used, its quantity, energy, and half-life. The procedure is conducted under strict safety regulations.
A radioisotope is the unstable, radioactive atom itself (e.g., Phosphorus-32). A radiolabel is the use of such an atom as a tag, or the tagged molecule/compound resulting from the process.
No, by definition. If a non-radioactive stable isotope (like Carbon-13) is used as a tag, the process is called 'stable isotope labeling'.
It is common in medical *research* (e.g., developing new drugs, studying disease mechanisms). It is not typically used in routine clinical practice with patients, though related terms like 'radioactive tracer' are used in diagnostic imaging (e.g., nuclear medicine).