What does tachypnoea mean?
Tachypnoea is a formal medical term for breathing faster than expected. It is especially used when an unusually high respiratory rate is observed in a person at rest, during an illness, or under particular conditions such as pregnancy, exertion, fever, lung disease, or metabolic disturbance. The word is precise rather than conversational: it identifies an observed rate of breathing without automatically explaining its cause or implying the severity of the underlying condition. Tachypnoea may occur alongside breathlessness, low oxygen levels, chest pain, or increased respiratory effort, but those features are not part of the word’s definition. British medical writing generally uses “tachypnoea,” while American usage commonly uses “tachypnea.” Understanding the term is useful because respiratory rate is a basic clinical sign, and recognizing tachypnoea can help prompt further assessment of the heart, lungs, blood, and metabolic system.
nounAbnormally rapid breathing, especially when it occurs at rest or is faster than expected for the person’s age and condition. The term is chiefly used in medicine.
- An abnormally rapid rate of breathing, typically faster than expected for the individual’s age, resting state, or clinical condition.
"The patient’s tachypnoea increased during the examination, prompting the medical team to assess her oxygen saturation."
"Severe tachypnoea was noted on admission, and the clinician ordered an urgent assessment of her respiratory status."
"In veterinary reports, tachypnoea may be used to describe rapid breathing associated with pain, fever, or lung disease."
The plural is rare because tachypnoea is often used as a singular clinical finding or as an uncountable term.
"The records noted tachypnoeas in several patients awaiting assessment."
Tachypnoea is a precise medical name for breathing faster than the body should—and the word itself is built from Greek roots meaning “rapid” and “breathing.”
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tachypnoea come from?
Tachypnoea comes from Greek roots meaning “rapid” and “breathing,” combining the idea of swiftness with the Greek term for breath or respiration. Its development reflects the tradition of medical vocabulary built from Greek elements, in which precise clinical concepts are expressed through standardized compounds. The related words tachycardia, tachometer, and tachistoscope share the Greek root for speed or rapidity, while terms such as pneumonia belong to the same broad respiratory vocabulary built from Greek forms associated with breath and the lungs.
Related word forms
How tachypnoea is actually used
This is a formal medical term. In British English it is usually written tachypnoea; tachypnea is the standard US spelling. It may describe rapid breathing in a clinical setting without necessarily implying distress, although accompanying symptoms such as breathlessness, hypoxia, or respiratory effort require separate assessment.
Easily confused with tachypnoea
Tachypnea is the US spelling of the same word, while tachypnoea is the traditional British spelling.
Dyspnoea means shortness of breath or difficult breathing, whereas tachypnoea specifically emphasizes an abnormally high breathing rate.
Hyperventilation refers to excessive ventilation, often involving changes in carbon dioxide, while tachypnoea describes the rate of breathing and does not by itself establish the cause or gas-exchange pattern.