Definición de sigma en inglés:

sigma

Silabificación: sig·ma
Pronunciación: /ˈsiɡmə
 
/

sustantivo

1The eighteenth letter of the Greek alphabet (Σ, σ), transliterated as ‘s.’.
Más ejemplos en oraciones
  • He coined this latter term and employed the Greek letter lower case sigma to denote its population parameter.
  • Alpha, rho, tau, sigma, omega, Ash went over the letters he saw in his mind while Lari just stared, apparently in her own little world.
  • Finally, even if epsilon is the correct reading, in the letter space to its right, where Meritt read part of an iota, are traces of what appears to be a sigma.
2 (Sigma) [followed by Latin genitive] Astronomy The eighteenth star in a constellation: Sigma Octantis
Más ejemplos en oraciones
  • Finally, the final green beam of light was shot straight up at the constellation Sigma.
3 Chemistry & Physics Relating to or denoting an electron or orbital with zero angular momentum around an internuclear axis.
Más ejemplos en oraciones
  • These conical intersections are fundamentally different from the ‘H-vinyl’ structures found in simple alkenes because they involve the interaction of four sigma electrons, as opposed to two pi electrons and two sigma electrons.
  • The sigma bond occupies the internuclear space, and the two pi bonds are at 90° angles to each other surrounding the carbon-carbon internuclear space.
  • The triple bond is composed of one sigma bond from overlap of sp hybrid orbitals, and two pi bonds, from overlap of two sets of p orbitals.

símbolo

Volver al principio  

Definición de sigma en:

Obtener más de Oxford Dictionaries

Subscribirse para eliminar anuncios y acceder a los recursos premium

Palabra del día retroflex
Pronunciación: ˈrɛtrə(ʊ)flɛks
adjective
turned backwards