anticoagulant
an-tee-koh-AG-yuh-luhnt
/ˌæntikoʊˈæɡjələnt/
A substance that prevents, delays, or inhibits the clotting of blood.
Can refer to a medication taken by a patient (like warfarin) or a chemical added to a blood collection tube to keep the sample liquid.
The story behind the word. The root of coagulation is 'coagulare', which Romans used to describe curdling milk to make cheese. Adding 'anti-' creates a word that literally means 'against curdling,' keeping our blood flowing freely like liquid instead of turning into solid curds.
Word relationships
- blood thinner: A common lay term that is technically inaccurate, as these substances do not actually reduce the viscosity of the blood.
- coagulant: A substance that actively promotes blood clotting.
Commonly confused with
- coagulation: Coagulation is the process of blood clotting, while anticoagulant is the substance that stops this process.
Word family
- coagulate (verb): To change from a liquid to a thickened or solid state.
Collocations
- oral anticoagulant
- anticoagulant therapy
- natural anticoagulant
Example sentences
- "The blood collection bag contains a liquid anticoagulant to prevent the donation from turning into a solid clot." Blood bank storage
Memory hook
Anti (against) + Coagulate (clumping/curdling). It fights the clump. Anti-clump agent.
When not to use
Do not confuse with coagulants, which promote clotting, or thrombolytics, which actively dissolve existing clots.
Fun facts
- Leeches secrete a powerful natural anticoagulant called hirudin in their saliva so they can feed on blood without it clotting.
- Many rodent poisons are actually high-dose anticoagulants that cause internal bleeding.
Related words
Explore more words
coagulant, hemostasis, antifreeze, antidote, antioxidant, decongestant
Take your vocabulary further with LangBlitz
Our English vocabulary app: FSRS spaced repetition, 5,000+ curated words across 119 topic groups, CEFR A1 to C2. Explore your mastery with the beautiful Vocabulary World feature.