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beta line

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be⋅ta

  [bey-tuh or, especially Brit., bee-]
–noun
1. the second letter of the Greek alphabet (β, B).
2. the consonant sound represented by this letter.
3. (initial capital letter) Astronomy. a star that is usually the second brightest of a constellation: The second brightest star in Taurus is Beta Tauri.
4. Chemistry.
a. one of the possible positions of an atom or group in a compound.
b. one of two or more isomeric compounds.
5. the second of any series, as in chemistry or physics.
6. Also called beta coefficient, beta line. Stock Exchange. an arbitrary measure of the volatility of a given stock using an index of the volatility of the market as a whole: A beta of 1.1 indicates a stock that is 10 percent more volatile than the market.
7. (initial capital letter) Trademark. a brand of tape format for VCR tape, incompatible with other formats. Compare VHS.
8. Chiefly British. a grade showing that a student is in the middle or second of three scholastic sections in a class. Compare alpha (def. 7), gamma (def. 9).
Origin:
< L < Gk bêta < Sem; cf. Heb bēth beth
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Financial Dictionary

beta

A mathematical measure of the sensitivity of rates of return on a portfolio or a given stock compared with rates of return on the market as a whole. A high beta (greater than 1.0) indicates moderate or high price volatility. A beta of 1.5 forecasts a 1.5% change in the return on an asset for every 1% change in the return on the market. High-beta stocks are best to own in a strong bull market but are worst to own in a bear market. See also alpha, capital-asset pricing model, characteristic line, portfolio beta.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Medical Dictionary

Main Entry: 2beta
Variant: or β-
Function: adjective
1 : of or relating to one of two or more closely related chemicalsubstances beta chain of hemoglobin> <β-yohimbine> —used somewhat arbitrarily to specify ordinal relationship or a particular physical form and especially one that isallotropic, isomeric, stereoisomeric, or sometimes polymeric (as in β-D-glucose)
2 : second in position in the structure of an organic molecule from aparticular group or atom; also : occurring at or having a structure characterized by such a position <beta substitution>
3 : producing a zone ofdecolorization when grown on blood media —used of some hemolytic streptococci or of the hemolysis they cause
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

beta be·ta (bā'tə, bē'-)
n.


  1. Symbol β The second letter of the Greek alphabet.

  2. The second item in a series or system of classification.

  3. A beta particle.

  4. A beta ray.

adj.

  1. Of or relating to the second position from a designated carbon atom in an organic molecule at which an atom or a radical may be substituted.

  2. Of or relating to an isomeric variation of a chemical compound, such as a stereoisomer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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