What does ampoule mean?
An ampoule is a small, hermetically sealed container, typically made of glass, that holds a single measured dose of a liquid such as a medication, vaccine, serum, or laboratory reagent. Because it is fused shut, its contents remain sterile until the moment of use; the user snaps off the narrow neck to open it, which is why ampoules are favored for injectable drugs and sensitive compounds. The word comes from the French 'ampoule', itself derived from the Latin 'ampulla', a small flask used in antiquity, which also gives English the adjective 'ampullaceous'. In modern usage the term belongs mainly to medical, pharmaceutical, and scientific vocabulary, though it also appears in cosmetics packaging. It is spelled 'ampoule' in British English and often 'ampule' or 'ampul' in American English, all referring to the same object.
nounA small sealed glass container holding a single dose of a liquid medication or other substance, designed to be broken open at the neck to access its contents.
- A small sealed glass vessel containing one dose of a drug, vaccine, serum, or other liquid, broken open at the neck for use.
"The nurse snapped the neck off an ampoule of adrenaline before administering the injection."
"Each vaccine dose was drawn from a single-use glass ampoule."
"The chemist cracked open an ampoule of the reagent under the fume hood."
Standard pluralization; the singular refers to one sealed dose container.
"The shipment contained fifty ampoules of the antivenom."
The word traces back to Latin 'ampulla', the little two-handled flask Romans prized so much they gave us the phrase 'to speak with an ampulla' — meaning to talk in an inflated, pompous style.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ampoule
The word 'ampoule' entered English in the early 19th century by way of French, where 'ampoule' denoted both a small vial and, historically, a small flask. Its ultimate source is the Latin 'ampulla', a globular two-handled container used by the Romans for liquids such as oil and wine. The same Latin root produced the English adjective 'ampullaceous' and the related forms 'ampule' and 'ampul'.
How ampoule is actually used
The word carries a clinical, pharmaceutical register and appears almost exclusively in medical, laboratory, and cosmetic contexts. Spelling varies by region: 'ampoule' predominates in British English, while American English more often uses 'ampule' or 'ampul'.
Easily confused with ampoule
Ampule (also spelled ampul) is simply an alternative spelling of the same word — 'ampoule' is the British/French-derived form and 'ampule' the more common American spelling.
A vial is a small bottle that can be opened and resealed, whereas an ampoule is hermetically sealed and must be broken to be opened.