Focal

4 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Focal \Fo"cal\, a. [Cf. F. focal. See {Focus}.]
     Belonging to,or concerning, a focus; as, a focal point.
     [1913 Webster]
  
     {Focal distance, or length, of a lens or mirror} (Opt.), the
        distance of the focus from the surface of the lens or


        mirror, or more exactly, in the case of a lens, from its
        optical center. 
  
     {Focal distance of a telescope}, the distance of the image of
        an object from the object glass.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  focal
       adj 1: having or localized centrally at a focus; "focal point";
              "focal infection"
       2: of or relating to a focus; "focal length"

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  66 Moby Thesaurus words for "focal":
     approaching, arch, asymptotic, banner, basic, bedrock, capital,
     cardinal, central, centralized, centred, centripetal, centrolineal,
     champion, chief, concentrated, concurrent, confluent, confocal,
     connivent, convergent, converging, crowning, dominant, essential,
     first, foremost, fundamental, great, headmost, hegemonic,
     indispensable, leading, life-and-death, life-or-death, magisterial,
     main, master, material, meeting, mutually approaching,
     of vital importance, overruling, paramount, predominant,
     preeminent, preponderant, prevailing, primal, primary, prime,
     principal, radial, radiating, ranking, ruling, sovereign, star,
     stellar, substantive, supereminent, tangent, tangential, topflight,
     uniting, vital
  
  

From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:

  FOCAL
       
          1. FOrmula CALculator.
       
          An interactive system written by Rick Merrill of {DEC} in 1969
          for {PDP-5} and {PDP-8}.  It was a descendant of {AID}/{JOSS}.
       
          Versions: FOCAL-69, FOCAL-1971, FOCAL-11 (for {PDP-11} under
          {RT-11}).
       
          (1994-12-21)
       
          2. Forty-One CAlculator Language.
       
          The programming language of the HP-41 calculator line.
       
          (1994-12-21)