quinacrine
Very LowTechnical (Medical/Pharmacological)
Definition
Meaning
A synthetic antimalarial and anti-protozoal drug, also formerly used as an anthelmintic and for giardiasis and tapeworm infections.
A yellow acridine dye derivative, known chemically as mepacrine or 6-chloro-9-(4-diethylamino-1-methylbutylamino)-2-methoxyacridine, historically significant in medicine, notably as a treatment for malaria before the development of chloroquine.
Linguistics
Semantic Notes
The term is almost exclusively used in medical, historical, and pharmacological contexts. Its primary referent is the chemical/drug itself; it lacks metaphorical or extended non-technical meanings.
Dialectal Variation
British vs American Usage
Differences
No major differences in meaning or usage. 'Mepacrine' was historically more common as a British proprietary name, while 'quinacrine' (especially 'quinacrine hydrochloride') has been standard in American pharmacology.
Connotations
None beyond the technical/medical referent.
Frequency
Extremely low frequency in both dialects, limited to specialized texts and historical accounts of tropical medicine.
Vocabulary
Collocations
Grammar
Valency Patterns
[to treat/for] + [disease] + with quinacrinequinacrine + [verb: is/was used, administered, prescribed]Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Not applicable.
Academic
Used in medical history, pharmacology, and parasitology papers discussing historical treatments.
Everyday
Virtually never used in everyday conversation.
Technical
Primary context: in medical textbooks, pharmacological databases, and historical reviews of antimalarial agents.
Examples
By Part of Speech
adjective
British English
- The quinacrine regimen was standard in the 1940s.
- Quinacrine therapy has largely been superseded.
American English
- The quinacrine protocol showed efficacy.
- Quinacrine hydrochloride is the salt form.
Examples
By CEFR Level
- Quinacrine is a medicine for malaria.
- Doctors used quinacrine extensively during the Second World War to treat malaria among troops.
- While largely historical now, quinacrine's role in mid-20th century medicine is significant, particularly for its use in suppressing malaria in endemic regions prior to the adoption of chloroquine.
Learning
Memory Aids
Mnemonic
Think: 'QUIN' (like quinine, another antimalarial) + 'ACRINE' (its chemical class, acridine). It's a quinine-like drug from the acridine family.
Conceptual Metaphor
None established in common usage.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- May be transliterated as 'квинакрин' or known under the name 'мепакрин'.
Common Mistakes
- Misspelling: 'quinacrin', 'quinnacrine'. Confusing it with 'quinine' or 'chloroquine'.
Practice
Quiz
Quinacrine is primarily classified as what type of agent?
FAQ
Frequently Asked Questions
Its use today is very rare and largely historical. It has been superseded by safer, more effective antimalarials like chloroquine and artemisinin-based combinations. It is mentioned primarily in historical or pharmacological contexts.
No. Both are antimalarial drugs, but they are chemically distinct. Quinine is a natural alkaloid from the cinchona tree, while quinacrine (mepacrine) is a fully synthetic acridine derivative developed later.
Quinacrine is a yellow acridine dye derivative. Its chemical structure gives it a characteristic yellow colour, which historically could sometimes cause a temporary yellowing of the skin in patients taking it.
You would most likely encounter it in specialized medical or pharmacological literature, historical accounts of tropical medicine, or in discussions about the development of antimalarial drugs. It is not part of general vocabulary.