What does cannulae mean?
'Cannulae' is the plural of 'cannula', a slender tube that clinicians insert into a vein, body cavity, or tissue to deliver fluids, medication, or anaesthesia, or to withdraw samples. Derived from Latin canna, meaning reed or cane, the word reflects the instrument's simple tubular design. Cannulae vary enormously in gauge and flexibility, from large-bore tubes used in emergency resuscitation to ultra-fine instruments employed in liposuction, ophthalmic surgery, and laboratory microinjection. Because they are typically left in place longer than a needle would be, they allow repeated access without additional punctures. In modern practice many hospitals use the anglicized plural 'cannulas', but 'cannulae' remains standard in formal, academic, and British medical writing. The term signals precision and technical expertise, appearing almost exclusively in clinical, surgical, and scientific contexts rather than everyday speech.
nounThe plural of cannula: thin tubes inserted into the body or a vessel to deliver or remove fluids, administer medication, or gain access during medical and laboratory procedures.
- Plural form of cannula: slender flexible tubes inserted into veins, body cavities, or tissues for administering fluids, medication, anaesthesia, or for drainage and sampling.
- In laboratory and cosmetic contexts: fine tubes (as used in microsurgery, liposuction, or cell injection techniques).
"The surgeon selected several sterile cannulae of different gauges before beginning the liposuction procedure."
"The nurse flushed each of the intravenous cannulae with saline before attaching the drip lines."
"Cosmetic surgeons increasingly favour blunt-tipped cannulae over sharp needles for filler injections, as they reduce bruising."
'Cannulae' is itself the plural of the singular noun 'cannula'. Both the classical plural 'cannulae' and the anglicized 'cannulas' are accepted; British and formal academic texts tend to prefer 'cannulae'.
"Sterile cannulae were laid out on the tray, ready for the procedure."
Every cannula traces its name back to the humble reed — Latin canna — the same root that gave us 'cannon' and 'channel', making it one of medicine's oldest-sounding tools.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cannulae
Cannulae comes from the Latin cannula, a diminutive of canna, meaning 'reed' or 'cane' — an apt metaphor for a slender hollow tube. The word entered English medical terminology in the early modern period alongside other Latinate surgical vocabulary. It shares this root with a strikingly diverse set of English words: 'canal', 'channel' (via French chenal), 'canyon', and even 'cannon', all ultimately referring to hollow, tube-like shapes.
Related word forms
How cannulae is actually used
Strictly the plural of 'cannula'; in clinical writing both the Latinate plural 'cannulae' and the anglicized 'cannulas' appear, though British usage leans toward the classical form. The word belongs to formal medical and scientific register — lay readers more often encounter the singular 'cannula' or simply 'tube'.
Easily confused with cannulae
Despite sharing the same Latin root canna (reed), a cannon is a large gun, while cannulae are slender medical tubes.
A canal is a long artificial waterway or bodily channel, whereas cannulae are small tubes used for accessing vessels or cavities.