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Definition of semicircle

semicircle

/ˈsɛm.iˌsɜːr.kəl/
sem · i · cir · cle
Adverb:semicircularly
•
Plural:semicircles
•
Adjective:semicircular
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semicircle Lexical Profile

semicircle Game Scores & Validity

• noun

1

A half of a circle or of its circumference, formed by cutting a whole circle along a diameter line.

Example

"The geometry students calculated the area and perimeter of the semicircle."

2

An arrangement of people or objects forming a curved line shaped like half a circle.

Example

"The teacher asked the children to sit in a semicircle around the piano."

Synonyms
View all synonyms for semicircle

• Rhymes for semicircle

• Nearby Words

semiautonomous
semibasement
semibold
semicircle
semicircular
semicolon
semiconductor

Word Origin & Etymology

Borrowed in the early 16th century from Latin semicirculus, formed from semi- ('half') and circulus ('little circle', diminutive of circus).

Cite this Entry

Wordmom. (2026). Definition of Semicircle. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/semicircle
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