TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

Saved records

Record 1 1991-03-22

English

Subject field(s)
  • Facilities and Instruments (Astronomy)
DEF

A reflecting telescope in which the light is reflected from the (parabolic) main mirror onto a convex (hyperbolic) secondary mirror and back through a hole in the center of the main mirror, thence into the eyepiece.

Key term(s)
  • cassegrainian

French

Domaine(s)
  • Installations et instruments (Astronomie)
DEF

Combinaison optique dans laquelle la lumière se réfléchit sur un miroir principal parabolique concave, puis sur un petit miroir hyperbolique convexe, pour donner une image finale agrandie, à travers un trou percé au centre du miroir principal.

Spanish

Delete saved record 1

Record 2 2015-04-29

English

Subject field(s)
  • Security Devices
  • Nuclear Fission Reactors
DEF

A control member which, singly or in concert with others, provides a reserve of negative reactivity for the purpose of emergency shutdown of a reactor.

OBS

safety member; safety element: terms and definition standardized by ISO.

French

Domaine(s)
  • Dispositifs de sécurité
  • Réacteurs nucléaires de fission
DEF

Élément de commande qui, seul ou de concert avec d'autres, fournit une réserve de réactivité négative pour le cas d'un arrêt d'urgence d'un réacteur.

OBS

élément de sécurité : terme et définition normalisés par l'ISO.

Spanish

Delete saved record 2

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