To do this, place the angle of your test square at the center of the circle and rule two radii.
Not only Massinger, but many of our old writers, use parallels for radii.
Parietes and basis permeated by pores; radii not permeated by pores.
In some of the plans the cells are on a circumference, and in some on radii.
This line forms the cross-bars, or supporting rungs, connecting the spokes, or radii.
Equal circles are those the diameters of which are equal, or the radii of which are equal.
When the radii are not developed, the sutures are very often obscure.
Not that in all circles the radii are equal, but only that they are so in the circle ABC.
Shell pinkish-purple or white, clothed by an orange-coloured membrane; radii represented by mere fissures; basis solid.
He is the central figure; all others are but radii emanating from him.
1590s, "cross-shaft," from Latin radius "staff, stake, rod; spoke of a wheel; ray of light, beam of light; radius of a circle," of unknown origin. Perhaps related to radix "root," but Tucker suggests connection to Sanskrit vardhate "rises, makes grow," via root *neredh- "rise, out, extend forth;" or else Greek ardis "sharp point."
The geometric sense first recorded 1610s. Plural is radii. Meaning "circular area of defined distance around some place" is attested from 1953. Meaning "shorter bone of the forearm" is from 1610s in English (the Latin word had been used thus by the Romans).
radius ra·di·us (rā'dē-əs)
n. pl. ra·di·us·es or ra·di·i (-dē-ī')
A line segment that joins the center of a circle with any point on its circumference.
A long, prismatic, slightly curved bone, the shorter and thicker of the two forearm bones, located laterally to the ulna.
Plural radii (rā'dē-ī') or radiuses