semicircular

sem·i·cir·cle

S0251200 (sĕm′ĭ-sûr′kəl)n.1. A half of a circle as divided by a diameter.2. An object or arrangement of objects or people in the shape of half a circle.

sem′i·cir′cu·lar (-kyə-lər) adj.

Thesaurus

Adj.

semicircular - curved into a half circlecurved, curving - having or marked by a curve or smoothly rounded bend; "the curved tusks of a walrus"; "his curved lips suggested a smile but his eyes were hard"

Translations

半圆形的

semicircle

(ˈsemisəːkl) noun a half circle. The chairs were arranged in a semicircle round the speaker.半圆形ˌsemiˈcircular (-ˈsəːkju-) adjective半圆形的

semicircular

enUK

semicircular

[sem″e-ser´ku-lar] shaped like a half-circle.semicircular canals the passages in the bony labyrinth" >labyrinth of the inner ear that control the sense of equilibrium" >sense of equilibrium. Each ear has three semicircular canals (anterior, lateral, and posterior), at approximately right angles to each other, which are filled with fluid and have ampullae" >ampullae (enlarged portions) at one end that contain nerve endings. (See also Plates.)
The semicircular canals respond to movement of the head. When the head changes position in any direction, the fluid in the canal that lies in the plane of movement also moves, but because of its inertia the fluid flow lags behind the head movement. Thus the fluid presses against the delicate hairs of the nerves in the ampulla, and the nerves then register the fact that the head is turning in a given direction so that the body can seek to maintain its equilibrium.
It is the fluid movement in the semicircular canals that causes the feeling of dizziness or vertigo after spinning. When the spinning stops, the fluid in the horizontal canal continues to move for a moment in the direction of the spin, giving a temporary false reading that the head is turning in the other direction. motion sickness" >motion sickness is caused by the unusual and erratic motions of the head in an airplane, car, or ship, and the resulting stimulation of the semicircular canals.

sem·i·cir·cu·lar

(sem'ē-sir'kyū-lăr), Forming a half circle or an incomplete circle. Synonym(s): semiorbicular

semicircular

S05-848220 (sĕm″ē-sŭr′kū-lăr) [″ + circulus, a ring] In the form of a half circle.

semicircular

sem·i·cir·cle

semicircle

Semicircular

Semicircular

semicircular

semicircular

sem·i·cir·cu·lar

semicircular

semicircular

Words related to semicircular

adj curved into a half circle

Related Words