| 释义 |
radius
ra·di·us R0018000 (rā′dē-əs)n. pl. ra·di·i (-dē-ī′) or ra·di·us·es 1. Abbr. r or rad. Mathematics a. A line segment that joins the center of a circle with any point on its circumference.b. A line segment that joins the center of a sphere with any point on its surface.c. A line segment that joins the center of a regular polygon with any of its vertices.d. The length of any such line segment.2. A circular area measured by a given radius: every family within a radius of 25 miles of the city center.3. A bounded range of effective activity or influence: the operating radius of a helicopter.4. A radial part or structure, such as a mechanically pivoted arm or the spoke of a wheel.5. Anatomy a. A long, prismatic, slightly curved bone in humans, the shorter and thicker of the two forearm bones, located on the lateral side of the ulna.b. A similar bone in many other vertebrates.
[Latin, ray, spoke of a wheel, radius; see ray1.]radius (ˈreɪdɪəs) n, pl -dii (-dɪˌaɪ) or -diuses1. (Mathematics) a straight line joining the centre of a circle or sphere to any point on the circumference or surface2. (Mathematics) the length of this line, usually denoted by the symbol r3. (Mathematics) the distance from the centre of a regular polygon to a vertex (long radius) or the perpendicular distance to a side (short radius)4. (Anatomy) anatomy the outer and slightly shorter of the two bones of the human forearm, extending from the elbow to the wrist5. (Zoology) a corresponding bone in other vertebrates6. (Zoology) any of the veins of an insect's wing7. (Botany) a group of ray florets, occurring in such plants as the daisy8. a. any radial or radiating part, such as a spokeb. (as modifier): a radius arm. 9. (Mechanical Engineering) the lateral displacement of a cam or eccentric wheel10. a circular area of a size indicated by the length of its radius: the police stopped every lorry within a radius of four miles. 11. the operational limit of a ship, aircraft, etc[C16: from Latin: rod, ray, spoke]ra•di•us (ˈreɪ di əs)
n., pl. -di•i (-diˌaɪ)
-di•us•es. 1. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter. 2. the length of such a line. 3. any radial or radiating part. 4. a circular area having an extent determined by the length of the radius from a given or specified central point: every house within a radius of 50 miles. 5. a field or range of operation or influence. 6. extent of possible operation, travel, etc., as under a single supply of fuel. 7. the bone of the forearm on the thumb side. 8. a corresponding bone in the forelimb of other vertebrates. [1590–1600; < Latin: staff, rod, spoke, beam, ray1] ra·di·us (rā′dē-əs) Plural radii (rā′dē-ī′) or radiuses 1. 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.2. The shorter and thicker of the two bones of the forearm or the lower portion of the foreleg. See more at skeleton.radiusOne of the two bones of the forearm.Thesaurus| Noun | 1. |  radius - the length of a line segment between the center and circumference of a circle or sphererdiam, diameter - the length of a straight line passing through the center of a circle and connecting two points on the circumferencesemidiameter - the apparent radius of a celestial body when viewed as a disc from the earthradius of curvature - the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given pointlength - the linear extent in space from one end to the other; the longest dimension of something that is fixed in place; "the length of the table was 5 feet" | | 2. | radius - a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)straight line - a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line" | | 3. | radius - a circular region whose area is indicated by the length of its radius; "they located it within a radius of 2 miles"region, part - the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space" | | 4. | radius - the outer and slightly shorter of the two bones of the human forearmforearm - the part of the superior limb between the elbow and the wristarm bone - a bone in the arm | | 5. |  radius - support consisting of a radial member of a wheel joining the hub to the rimspoke, wheel spokebicycle wheel - the wheel of a bicyclecartwheel - a wheel that has wooden spokes and a metal rimsupport - any device that bears the weight of another thing; "there was no place to attach supports for a shelf"wagon wheel - a wheel of a wagon |
Translationsradius (ˈreidiəs) noun1. (plural ˈradiuses) the area within a given distance from a central point. They searched within a radius of one mile from the school. 範圍 半径, 范围2. (plural ˈradii (-diai) ) a straight line from the centre of a circle to its circumference. 半徑 半径
radius
radius, in anatomy: see armarm,
upper limb in humans. Three long bones form the framework of the arm: the humerus of the upper arm, and the radius (outer bone) and ulna (inner bone) of the forearm.
..... Click the link for more information. .radius[′rād·ē·əs] (anatomy) The outer of the two bones of the human forearm or of the corresponding part in vertebrates other than fish. (mathematics) A line segment joining the center and a point of a circle or sphere. The length of such a line segment. radius1. a straight line joining the centre of a circle or sphere to any point on the circumference or surface 2. the length of this line, usually denoted by the symbol r 3. the distance from the centre of a regular polygon to a vertex (long radius) or the perpendicular distance to a side (short radius) 4. Anatomy the outer and slightly shorter of the two bones of the human forearm, extending from the elbow to the wrist 5. a corresponding bone in other vertebrates 6. any of the veins of an insect's wing 7. a group of ray florets, occurring in such plants as the daisy 8. the lateral displacement of a cam or eccentric wheel RADIUSRemote Authentication Dial-In User ServiceRADIUS(Remote Authentication Dial-In User Service) An authentication, authorization and accounting (AAA) protocol developed by Livingston Enterprises (later acquired by Lucent). RADIUS uses a challenge/response method for authentication and has been widely used prior to Diameter. See Diameter, network access server and challenge/response.radius
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 Obstetrics A study–Routine Antenatal Diagnostic Imaging with Ultrasound–involving 15,000 ♀ that evaluated fetal ultrasonography Conclusion No benefitra·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.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]See RAD
RADIUS
| Acronym | Definition |
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| RADIUS➣Remote Authentication Dial in User Service | | RADIUS➣Research and Development in the United States | | RADIUS➣Routine Antenatal Diagnostic Imaging with Ultrasound Study (obstetrics and gynecology) | | RADIUS➣Remote Access Dial-In User Server | | RADIUS➣Research And Development for Image Understanding Systems | | RADIUS➣Rheumatoid Arthritis DMARD (Disease Modifying Antirheumatic Drug) Intervention and Utilization Study | | RADIUS➣Remote Authentication Dial-In User Server/Service (networking protocol) | | RADIUS➣Remote Authentication Dial in User System (computer networks) | | RADIUS➣Remote Aims Data Input User System (New Jersey) | | RADIUS➣Research Archive on Disability in the United States (database) |
radius
Synonyms for radiusnoun the length of a line segment between the center and circumference of a circle or sphereSynonymsRelated Words- diam
- diameter
- semidiameter
- radius of curvature
- length
noun a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)Related Wordsnoun a circular region whose area is indicated by the length of its radiusRelated Wordsnoun the outer and slightly shorter of the two bones of the human forearmRelated Wordsnoun support consisting of a radial member of a wheel joining the hub to the rimSynonymsRelated Words- bicycle wheel
- cartwheel
- support
- wagon wheel
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