**semicircle** — 1520s, from SEMI (Cf. semi ) + CIRCLE (Cf. circle). Semicircular is attested from early 15c … Etymology dictionary

**semicircle** — ► NOUN ▪ a half of a circle or of its circumference. DERIVATIVES semicircular adjective … English terms dictionary

**semicircle** — [sem′i sʉr΄kəl] n. [L semicirculus: see SEMI & CIRCLE] 1. a half circle 2. anything in the form of a half circle semicircular [sem′i sʉr΄kyə lər] adj … English World dictionary

**Semicircle** — In mathematics (more specifically geometry), a semicircle is a two dimensional geometric shape that forms half of a circle. Being half of a circle s 360°, the arc of a semicircle always measures 180°. A triangle inscribed in a semicircle is… … Wikipedia

**semicircle** — n. 1) to form a semicircle 2) in a semicircle * * * [ semɪˌsɜːk(ə)l] in a semicircle to form a semicircle … Combinatory dictionary

**semicircle** — UK [ˈsemɪˌsɜː(r)k(ə)l] / US [ˈsemɪˌsɜrk(ə)l] noun [countable] Word forms semicircle : singular semicircle plural semicircles 1) maths half of a circle 2) a group of people or things arranged in a curved line as if they were around the edge of… … English dictionary

**semicircle** — sem|i|cir|cle [ˈsemiˌsə:kəl US ə:r ] n half a circle in a semicircle ▪ About 50 children sat in a semicircle around me. >semicircular [ˌsemiˈsə:kjulə US ˈsə:rkjulər] adj … Dictionary of contemporary English

**semicircle** — sem|i|cir|cle [ semi,sɜrkl ] noun count 1. ) half of a circle 2. ) a group of people or things arranged in a curved line as if they were around the edge of half a circle: The kids sat in a semicircle around the teacher … Usage of the words and phrases in modern English

**semicircle** — noun (C) 1 half a circle 2 a group arranged in a curved line, as if on the edge of half a circle: Get the kids to sit in a semicircle. semicircular /semi s:kjl/ adjective … Longman dictionary of contemporary English

**semicircle** — n. 1 half of a circle or of its circumference. 2 a set of objects ranged in, or an object forming, a semicircle. Etymology: L semicirculus (as SEMI , CIRCLE) … Useful english dictionary