semicircle

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. A half of a circle.
  2. A surveyor's instrument for measuring angles; a graphometer.
  3. An arc whose center is the penalty spot, extending from the top of the penalty area.
动词 v.
  1. To travel or move around in a semicircle. ambitransitive

词形变化

semicircles plural semicircles present,singular,third-person semicircling participle,present semicircled participle,past semicircled past

词源

词源 1
Etymology tree
Proto-Indo-European *sem-
Proto-Indo-European *sēmi
Latin sēmi-bor.
English semi-
Ancient Greek κίρκος (kírkos)bor.
Latin circus
Proto-Indo-European *-lós
Proto-Indo-European *-elós
Proto-Italic *-elos
Latin -ulus
Latin circulus
Old French cerclebor.
Middle English circle
English circle
English semicircle
From semi- + circle.
词源 2
Etymology tree
Proto-Indo-European *sem-
Proto-Indo-European *sēmi
Latin sēmi-bor.
English semi-
Ancient Greek κίρκος (kírkos)bor.
Latin circus
Proto-Indo-European *-lós
Proto-Indo-European *-elós
Proto-Italic *-elos
Latin -ulus
Latin circulus
Old French cerclebor.
Middle English circle
English circle
English semicircle
From semi- + circle.
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