castor

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castor:

see beaverbeaver,
either of two large aquatic rodents, Castor fiber and Castor canadensis, known for their engineering feats. They were once widespread in N and central Eurasia except E Siberia, and in North America from the arctic tree line to the S United States.
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.

Castor

(kăs`tər), bright star in the constellation GeminiGemini
[Lat.,=the twins], northern constellation lying on the ecliptic (the sun's apparent path through the heavens) between Taurus and Cancer, N of Canis Minor; it is one of the constellations of the zodiac. Gemini is traditionally depicted as two men.
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; Bayer designation α Geminorum; 1992 position R.A. 7h34.1m, Dec. +31°54'. Slightly dimmer than PolluxPollux,
brightest star in the constellation Gemini; Bayer designation Beta Geminorum; 1992 position R.A. 7h44.8m, Dec. +28°03'. An orange giant of spectral class K0 III, it is the nearest giant star, lying at a distance of 35 light-years.
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, with which it forms the Twins, Castor has an apparent magnitudemagnitude,
in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the dimmest stars
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 of 1.58, which still makes it one of the 25 brightest stars in the sky. Castor is actually a six-star system, being a visual triple each component of which is a binary starbinary star
or binary system,
pair of stars that are held together by their mutual gravitational attraction and revolve about their common center of mass. In 1650 Riccioli made the first binary system discovery, that of the middle star in the Big Dipper's handle, Zeta
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; the three components are an eclipsing binary and a pair of spectroscopic binaries. The two brightest components are white, main-sequence stars of spectral classesspectral class,
in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically.
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 A1 and A5. The system is about 50 light-years distant.

Castor

(kass -ter, kahss -) (α Gem) A white star that is the second-brightest in the constellation Gemini. It is a visual triple star, the two brighter components having an orbital period of about 470 years; the third component, a flare star, is located some distance away. All three are spectroscopic binaries. mv : 1.9 (A), 2.9 (B), 1.57 (AB); Mv : 0.5 (AB); spectral type: A1 V (A), A2 V (B); distance: 15 pc.

Castor

[′kas·tər]
(astronomy)
A multiple star of spectral classification A0 in the constellation Gemini; the star α Geminorum.

castor

1. the brownish aromatic secretion of the anal glands of a beaver, used in perfumery and medicine
2. the fur of the beaver
3. a less common name for beaver
References in periodicals archive ?
Co Founded in 1907, Hamilton Caster is an industry leader in designing and manufacturing stock and custom-engineered heavy duty casters, wheels, carts, and trailers.
The caster is being revamped not just technically but visually as well.
8220;We can now offer more options of casters because of the increased number of components for more material handling solutions.
The company's product range now covers a variety of casters and wheels, including light casters, heavy duty casters, high temperature wheel casters, forklift truck wheels, carts, bearings, ESD (electrostatic dissipative) plastic-made casters and wheels, PP (polypropylene) wheels, nylon wheels, ESD elastic TPR (thermal plastic rubber) caster wheels, rollers, and industrial-use wheels.
Plenty of hybrids, small roach and bream on punch bread and caster.
Anesthesia and Crash carts come standard with a tracking caster, making them easy to maneuver when pushed over long distances.
Revvo Caster Co, West Seneca, NY Circle 188, or www.
Features a caster configuration that creates a slight yet constant tipping action from the front or back, permitting smooth rolling over curbs, ramps, tailgates, speed bumps and other impediments
Colson Caster produces more than 35,000 different caster models, ranging from tiny chair casters to giant industrial models capable of bearing 4,800 pounds each.
The deck, or surface, of the Onyx Bed sits 3" from the floor without casters and 7" with standard casters.
Casters must pass a written, oral and 2 1/2-hour performance test to receive the certificate.
So they must be fully adjustable for both height and angle, and they also must ride on casters.