semicircle

From semi- + circle.

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semicircle (plural semicircles)

1. A half of a circle.
2. A surveyor's instrument for measuring angles; a graphometer.

   Synonym: graphometer

3. (soccer) An arc whose center is the penalty spot, extending from the top of the penalty area.

   Synonyms: penalty arc, the D

semicircle (third-person singular simple present semicircles, present participle semicircling, simple past and past participle semicircled)

1. (ambitransitive) To travel or move around in a semicircle.

• semicircular