radius


Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia.

radius

 [ra´de-us] (L.)
1. a line radiating from a center, or a circular limit defined by a fixed distance from an established point or center.
2. in anatomy, the bone on the outer or thumb side of the forearm.
grid radius grid focus.

ra·di·us

, gen. and pl.

ra·di·i

(rā'dē-ŭs, rā'dē-ī),
1. The lateral and shorter of the two bones of the forearm.
2. A straight line passing from the center to the periphery of a circle.
Synonym(s): radio- (3)
[L. spoke of a wheel, rod, ray]

radius

/ra·di·us/ (ra´de-us) pl. ra´dii   [L.]
1. a line from the center of a circle to a point on its circumference.
2. the bone on the outer or thumb side of the forearm, articulating proximally with the humerus and ulna and distally with the ulna and carpus.

radius fix´us  a straight line from the hormion to the inion.

radius

[rā′dē·əs] pl. radii
Etymology: L, ray
one of the outer, shorter bones of the forearm lying parallel to the ulna and partially revolving around it. Its proximal end is small and forms a part of the elbow joint. The distal end is large and forms a part of the wrist joint. The radius receives the insertions of various muscles and articulates with the humerus, ulna, scaphoid, lunate, and triangular bones.
enlarge picture
Radius and ulna

RADIUS

Obstetrics A study–Routine Antenatal Diagnostic Imaging with Ultrasound–involving 15,000 ♀ that evaluated fetal ultrasonography Conclusion No benefit

ra·di·us

, pl. radii (rā'dē-ŭs, -ī)
1. [TA] The lateral and shorter of the two bones of the forearm.
2. A straight line passing from the center to the periphery of a circle.
[L. spoke of a wheel, rod, ray]

radius

One of the two forearm bones, the other being the ULNA. The radius is on the thumb side and lies parallel to the ulna when the palm is facing forward. When the hand is rotated so that the thumb turns inward, the upper end of the radius rotates on a boss on the lower end of the upper arm bone (HUMERUS) but the lower end crosses over the ulna.

radius

the anterior bone in the lower part of the forelimb of vertebrates. see PENTADACTYL LIMB.
Figure 1: The nervous system.

radius

the smaller of the two forearm bones. Articulates at the elbow with the humerus and at the wrist with the carpal bones. adj radial in descriptions of forearm structures, on or towards the side of the radius, i.e. the thumb side. Figure 1.

ra·di·us

, pl. radii (rā'dē-ŭs, -ī)
1. [TA] Lateral and shorter of two bones of forearm.
2. Straight line passing from center to periphery of a circle.
[L. spoke of a wheel, rod, ray]

radius

pl. radii [L.]
1. a line radiating from a center, or a circular limit defined by a fixed distance from an established point or center.
2. one of the two long bones of the forearm that extends from the lateral side of the elbow to the medial side of the wrist or carpus. See also Table 10.

radius curvus syndrome
see curvus.
References in periodicals archive ?
O] as the radius of the reference sample the relative change [DELTA]N in the number of crystallites is proportional to
Distal radius fractures are the most common clinical fractures, occurring in an estimated 3.
Radius Mortgage Capital, LLC provides capital and liquidity for residential mortgage originators, financiers and investors by investing in credit-sensitive and liquidity-impaired residential mortgage loans.
Contact Blast Radius for pricing and additional information.
AAA Radius systems are used to gain real-time control over active subscriber sessions.
com) from Blast Radius simplifies the creation of critical business information and enables its fast and cost-efficient delivery to print, the Web and all other interaction points.
Idiom), the only enterprise software company to deliver advanced XML-based publishing and content globalization solutions, and Blast Radius Inc.
NASDAQ:FNDT), a leading provider of end-to-end corporate banking and securities processing software and services, today announced the signing of a definitive agreement to acquire Radius Partners, a leading provider of straight through processing (STP) solutions to the global securities industry, located in Pembroke, Massachusetts.
com/reports/c25802) has announced the addition of AAA and Network Security for Mobile Access: Radius, Diameter, EAP, PKI and IP Mobility to their offering.
Blast Radius, the world leader in XML content creation and collaboration solutions, today unveiled XMetaL Author DITA Edition, the first XML application built exclusively for natively authoring and publishing content using the Darwin Information Typing Architecture (DITA).
NASDAQ: WMGI), a global orthopaedic medical device company, announced today that a 23-patient clinical series on MICRONAIL(TM) Intramedullary Distal Radius System outcomes will be presented at the 2005 meeting of the American Society for Surgery of the Hand (ASSH).