Dictionary.com

radius

[ rey-dee-uhs ]
/ 藞re瑟 di 蓹s /
Save This Word!
See synonyms for: radius / radii on Thesaurus.com

Definition of radius

noun, plural ra路di路i [rey-dee-ahy], /藞re瑟 di藢a瑟/, ra路di路us路es.
QUIZ
SHALL WE PLAY A "SHALL" VS. "SHOULD" CHALLENGE?
Should you take this quiz on 鈥渟hall鈥 versus 鈥渟hould鈥? It should prove to be a quick challenge!
Question 1 of 6
Which form is used to state an obligation or duty someone has?

Origin of radius

1590鈥1600; <Latin: staff, rod, spoke, beam, originally, ray1

WORDS THAT MAY BE CONFUSED WITH radius

circumference, diameter, radius , tangent
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2022

How to use radius in a sentence

British Dictionary definitions for radius

radius
/ (藞re瑟d瑟蓹s) /

noun plural -dii (-d瑟藢a瑟) or -diuses

Word Origin for radius

C16: from Latin: rod, ray, spoke
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for radius

radius
[ r膩d膿-蓹s ]

n. pl. ra鈥i鈥s鈥s
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.
The American Heritage庐 Stedman's Medical Dictionary Copyright 漏 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for radius

radius
[ r膩d膿-蓹s ]

Plural radii (r膩d膿-墨鈥) radiuses
A line segment that joins the center of a circle or sphere with any point on the circumference of the circle or the surface of the sphere. It is half the length of the diameter.
The shorter and thicker of the two bones of the forearm or the lower portion of the foreleg. See more at skeleton.
The American Heritage庐 Science Dictionary Copyright 漏 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK