the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one quarter of the circle; the angle formed by two perpendicular lines that intersect; an angle of 90°.
the angle between two radii of a circle that cut off on the circumference an arc equal in length to one quarter of the circumference; an angle of 90° or π/2 radians
at right angles, perpendicular or perpendicularly
An angle having a measure of 90°.
right angle definition
An angle measuring ninety degrees, formed by the intersection of two perpendicular lines. (Compare acute angle and obtuse angle.)
noun, Astronomy. 1. the arc of the celestial equator measured eastward from the vernal equinox to the foot of the great circle passing through the celestial poles and a given point on the celestial sphere, expressed in degrees or hours. right ascension noun 1. (astronomy) the angular distance measured eastwards along the celestial equator from […]
- Right as rain
In good order or good health, satisfactory, as in He was very ill, but he’s right as rain now, or If she’d only worked on it another week everything would have been as right as rain. The allusion in this simile is unclear, but it originated in Britain, where rainy weather is a normal fact […]
- Right atrioventricular valve
right atrioventricular valve n. See tricuspid valve.
noun 1. a part of Paris, France, on the N bank of the Seine.