What does ampul mean?
An ampul is a small, hermetically sealed glass container that holds exactly one dose of a liquid — most often an injectable drug such as a local anesthetic, epinephrine, or a vaccine. The neck of the ampul is scored so that it can be snapped off cleanly, allowing the contents to be drawn into a syringe under sterile conditions; because the vessel is sealed until use, it protects sensitive medications from air, moisture, and contamination. The word belongs firmly to medical, pharmaceutical, and laboratory vocabulary, and it is rarely encountered outside those settings. Its spelling varies by region: British English uses 'ampoule', while American English commonly uses 'ampule' or 'ampul'. The name has a surprisingly long pedigree, tracing back through French to the Latin 'ampulla', the small flask used by the Romans for oils and perfumes — making this humble modern vial a direct linguistic descendant of an everyday object of antiquity.
nounA small sealed glass container holding a single dose of a drug or other liquid, opened by snapping off the top. 'Ampul' is a variant spelling of the more common 'ampoule' (US) or 'ampule' (also US).
- A small hermetically sealed glass vessel containing one dose of a medication or other liquid, broken open at the neck before use.
"The nurse snapped open an ampul of epinephrine and drew it into the syringe."
"The pharmacist cracked the ampul of lidocaine and loaded the syringe."
"Each vaccine dose came in a single-use glass ampul to guarantee sterility."
Also written 'ampoules' when using the standard British spelling of the same word.
"The shipment contained fifty ampuls of sterile saline."
Every ampul you snap open carries a piece of ancient Rome — its name descends from the Latin 'ampulla', the little flasks Romans used for oil and perfume.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ampul
The word entered English in the early modern period by way of French 'ampoule', which derives from Latin 'ampulla', meaning a small globular flask or jar. The Latin term itself was borrowed from Greek, related to 'amphoreus' (amphora), the two-handled storage vessel of the ancient Mediterranean — the shared prefix reflects the Greek root 'amphi-', meaning 'on both sides'. Cognates include the anatomical term 'ampulla' and the architectural word 'amphitheater'. In English usage, 'ampoule' became the dominant spelling, with 'ampule' and 'ampul' arising as American variants.
How ampul is actually used
Register is clinical and technical; the word appears mainly in pharmacy, medicine, and laboratory contexts. Spelling varies by region: 'ampoule' is standard in British English, while 'ampule' and 'ampul' are American variants, with 'ampule' generally preferred in US pharmaceutical labeling.
Easily confused with ampul
'Ampoule' is simply the standard spelling of the same word; 'ampul' and 'ampule' are accepted American variants.
An ampere is a unit of electric current, whereas an ampul is a sealed container for liquid medication.