What does semicircular mean?
Semicircular is an adjective meaning shaped like a semicircle, or arranged in a half-circle. The word is especially useful in geometry, architecture, art, and design, where it distinguishes a half-circle from other curved forms. For example, a semicircular arch spans an opening in the manner of half a circle, while people seated in a semicircular arrangement form a curved line around a central point. The adjective is also used more broadly for any object or arrangement with that characteristic profile. Although semicircle is the related noun naming the figure itself, semicircular describes the form or appearance of something. Together, they are useful terms whenever a specific, standardized description of a half-circle is needed.
adjectiveHaving the shape of a semicircle, or a half-circle. It may also describe something arranged in a curved half-circle formation.
- Having the shape of a semicircle or half-circle.
- Arranged in a curved formation that resembles a half-circle.
"The building's large windows form a semicircular arch above the entrance."
"The audience sat in a semicircular arrangement around the speaker."
"The path leads through a semicircular arch in the old stone wall."
A semicircular shape is what you get when one straight cut divides a perfect circle into two equal halves.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does semicircular come from?
The word combines the English prefix semi-, meaning 'half', with the root of circle. Both elements ultimately relate to Latin: semi- means 'half', while circulus is a Latin word for a small circle or ring. The adjective developed from the established English noun semicircle and has long been used for forms resembling half of a circle.
Related word forms
How semicircular is actually used
The term is primarily used in geometry, architecture, design, and descriptive writing. It is more precise than simply 'curved' when the curve is specifically one half of a circle.
Easily confused with semicircular
A semicircle is a geometric figure or shape, while semicircular is the adjective describing something that has that shape.
Hemispherical describes something shaped like half of a sphere, whereas semicircular describes something shaped like half of a circle.