embolus
C1/C2 (Academic, Technical)Formal, Technical, Medical
Definition
Meaning
A clot or other obstruction that travels through the bloodstream and lodges in a vessel, blocking blood flow.
In medicine, any abnormal particle (e.g., clot, air bubble, fat globule, or foreign body) circulating in the blood until it obstructs a vessel. It can cause conditions like stroke, pulmonary embolism, or organ damage. In a broader, sometimes metaphorical sense, it can represent any sudden obstruction or blockage within a system.
Linguistics
Semantic Notes
The term is used almost exclusively in medical contexts. It refers to the traveling particle itself, not the resulting condition (embolism) or its stationary form (thrombus). It is a count noun (emboli is the plural).
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are identical. Both varieties use the same medical terminology.
Connotations
Identical. Strictly medical/clinical.
Frequency
Equally rare in general discourse, used with identical frequency in medical contexts in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
An embolus traveled from [ORIGIN] to [DESTINATION].The [TYPE] embolus caused a [CONDITION].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “No common idioms. The term is technical.”
Usage
Context Usage
Business
Not used.
Academic
Used in medical, biological, and health science literature and lectures to describe a pathological process.
Everyday
Rarely used outside of discussions with healthcare professionals or in news reports about medical conditions.
Technical
Core term in clinical medicine, surgery, radiology, and pathology reports.
Examples
By Part of Speech
verb
British English
- The tissue fragment could potentially embolise to the lungs.
- The procedure carries a risk of embolising debris.
American English
- The tissue fragment could potentially embolize to the lungs.
- The procedure carries a risk of embolizing debris.
adverb
British English
- No standard adverbial form in use.
American English
- No standard adverbial form in use.
adjective
British English
- The patient presented with embolic stroke symptoms.
- The embolic material was identified via imaging.
American English
- The patient presented with embolic stroke symptoms.
- The embolic material was identified via imaging.
Examples
By CEFR Level
- (Not applicable for A2 level. The word is too technical.)
- The doctor said a blood clot, called an embolus, can be very dangerous.
- An embolus blocking a lung artery is a medical emergency.
- The CT scan revealed that an embolus had travelled from his leg to his pulmonary artery, causing a pulmonary embolism.
- Anticoagulant medication is often prescribed to prevent the formation of emboli.
- The aetiology of the ischaemic stroke was determined to be cardioembolic, with an embolus originating in the left atrial appendage.
- Microscopic analysis of the filtration device captured several small emboli consisting of atheromatous plaque.
Learning
Memory Aids
Mnemonic
Think of EMBO-LUS: "EMergency BOdy on the Loose in your blood Stream." It's a particle loose in your bloodstream causing an emergency.
Conceptual Metaphor
The circulatory system as plumbing or a river; an embolus is a 'clog' or 'debris' traveling down a pipe/river and getting stuck at a narrow point.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'эмбол' (the direct translation is correct). Be careful of the plural: 'emboli' /'эмболы'. The related term 'embolism' is 'эмболия'. Confusing 'embolus' (the object) with 'embolism' (the event/condition) is common.
Common Mistakes
- Using 'embolus' to refer to the stationary clot (correct: thrombus).
- Using 'embolus' as an uncountable noun (e.g., 'a lot of embolus').
- Confusing pronunciation: /emˈboʊləs/ instead of /ˈɛmbələs/.
Practice
Quiz
What is the primary difference between a thrombus and an embolus?
FAQ
Frequently Asked Questions
The plural is 'emboli' (pronounced /ˈɛmbəlaɪ/ or /ˈɛmbəliː/).
No. An 'embolus' is the actual traveling particle (the object). An 'embolism' is the event or condition caused by the embolus blocking a vessel (e.g., a pulmonary embolism).
Yes. While a blood clot (thromboembolus) is most common, an embolus can also be an air bubble (air embolus), fat (fat embolus), amniotic fluid, or even a foreign object like a bullet fragment.
It is appropriate in formal medical, clinical, academic, and scientific contexts. It would sound overly technical and out of place in general casual conversation, where 'clot' or 'blockage' might be used instead for simplicity.