nitrosourea
C2Technical / Academic / Medical
Definition
Meaning
A potent class of chemical compounds used as anti-cancer drugs and alkylating agents.
Any of a group of synthetic organic compounds containing a nitroso group linked to a urea molecule, known for their ability to damage DNA and thus inhibit cell replication, primarily used in chemotherapy for certain cancers and in biochemical research.
Linguistics
Semantic Notes
The term is highly domain-specific to oncology, pharmacology, and organic chemistry. It functions almost exclusively as a countable noun referring to the specific class of compounds (e.g., 'nitrosoureas like carmustine').
Dialectal Variation
British vs American Usage
Differences
No significant orthographic, phonetic, or usage differences. Standardised technical term.
Connotations
Identical clinical/scientific connotations.
Frequency
Identically low frequency, confined to specialist literature and clinical practice.
Vocabulary
Collocations
Grammar
Valency Patterns
The [oncologist] prescribed [a nitrosourea].[Nitrosourea] is used to treat [brain tumours].The mechanism of [nitrosourea] involves [alkylation].Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Core term in pharmacology, oncology, and medicinal chemistry research papers.
Everyday
Virtually never used outside a medical diagnosis conversation.
Technical
Precise term for a specific class of DNA-alkylating chemotherapeutic drugs.
Examples
By Part of Speech
adjective
British English
- The nitrosourea compound showed promising activity.
- They studied nitrosourea derivatives.
American English
- The nitrosourea treatment regimen was aggressive.
- They developed a new nitrosourea analog.
Examples
By CEFR Level
- Doctors use strong drugs called chemotherapy to fight cancer.
- Some chemotherapy drugs, such as nitrosoureas, work by damaging the DNA of cancer cells.
- Due to its lipophilic nature, the nitrosourea carmustine can cross the blood-brain barrier, making it valuable for treating gliomas.
Learning
Memory Aids
Mnemonic
Think: NITRO-SO (like an explosive nitro group) + UREA (a common chemical) = an explosive-like compound that targets cancer cells.
Conceptual Metaphor
A 'MOLECULAR WRENCH' that jams the machinery of DNA replication in fast-dividing cells.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'нитрозомочевина' in general contexts; it is a precise scientific term. In medical translation, the Latin borrowing 'нитрозомочевина' or the specific drug names (e.g., кармустин) are used.
Common Mistakes
- Misspelling as 'nitroso-urea' (with a hyphen) or 'nitrosurea'.
- Using it as an uncountable noun (e.g., 'The patient is on nitrosourea'). It is typically countable.
- Confusing it with unrelated chemotherapy drugs like 'nitrogen mustards'.
Practice
Quiz
What is the primary medical use of nitrosoureas?
FAQ
Frequently Asked Questions
No, it is a highly specialised term used almost exclusively in oncology, pharmacology, and chemistry.
It acts as an alkylating agent, meaning it attaches an alkyl group to DNA, which damages the DNA and prevents cancer cells from dividing and growing.
Yes, specific nitrosoureas like carmustine (BCNU) and lomustine (CCNU) are still used in treatment protocols for certain cancers, particularly brain tumours and lymphomas, though their use may be limited by side effects.
It is primarily a noun. It can function attributively as a noun modifier (e.g., 'nitrosourea therapy'), but it is not a standard adjective. It has no verb form.