What does circumflex mean?
A circumflex is a diacritic mark shaped like a small peaked hat (ˆ), placed above vowels in several writing systems. It is most familiar from French, where it appears in words such as hôtel and fête, but it also occurs in Portuguese, Romanian, Welsh, and Vietnamese, serving variously to indicate vowel length, quality, tone, or stress depending on the language. The name comes from Latin circumflectere, meaning to bend around, a nod to the mark's curved shape. Beyond linguistics, circumflex has a second, unrelated life in medicine, describing structures such as the circumflex artery that wind around other anatomical features. For learners of French and other languages, mastering when and where to place the circumflex is a common challenge, since it affects both spelling accuracy and pronunciation.
A diacritic mark (ˆ) placed above a vowel to indicate a particular pronunciation, stress, or historical sound change.
"Portuguese uses the circumflex in words like você to signal a closed vowel."
Often used in full as circumflex accent in traditional grammatical descriptions.
In anatomy, a structure—such as an artery or nerve—that winds around another body part.
"The axillary nerve gives off branches near the posterior circumflex humeral artery."
Strictly a medical term, always used attributively before the structure named.
Standard plural for the diacritic sense; rarely needed for the anatomical sense.
"The text contained several circumflexes over vowels in the French passages."
In French, the circumflex is a ghost of a lost letter — hôpital was once hospital, so the little hat marks where an s silently vanished centuries ago.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of circumflex
The word circumflex derives from the Latin verb circumflectere, meaning to bend around, formed from circum (around) and flectere (to bend). It entered English in the early modern period, originally referring both to the curved shape of the diacritic and, later, to anatomical structures that curve around a part. It shares the root flectere with English words such as flexible, reflect, inflect, and deflect.
Related word forms
How circumflex is actually used
As a linguistic term, circumflex appears mainly in discussions of spelling, typography, and language learning, and is usually paired with the word accent. The anatomical sense is technical and confined to medical contexts.
Easily confused with circumflex
A caret (^) is an editing mark inserted into text to show where something should be added, while a circumflex is a diacritic written above a letter.
An acute accent (´) slants upward over a vowel to indicate stress or quality, whereas a circumflex (ˆ) is a curved or peaked mark above the vowel.