英和和英

the letter 'r' in alphabet

a line segment called a radius

equatorial diameter

polar diameter

the radius of the circle of curvature

the radius of action

a thin tapering edge

the shortest diameter of an oval

(in mathematics) a plane called Gaussian plane

thin in diameter

a spherical mass

an involuntary muscle

involuntary muscles

relating to or near the radius

a spheroidal fullerene

in diameter

a gentle slope

thin plate

a hollow tyre

soft targets

bladed arsenopyrite

a relatively flat polyp

a fibrous amphibole

a radius which passes through focus of ellipse

a narrow adit

planing machine

one-half the minor axis of an ellipse

a smooth fault plane

eccentric circles

the ratio of the circumference of a circle to its diameter