GNU Collaborative International Dictionary of English

Found 2 definitions 

  1.       

    Conoid , n. [Gr. κωνοειδής conical; κῶνος cone + εἶδος form: cf. F. conoïde.]
    1. Anything that has a form resembling that of a cone.
      1913 Webster
    2. (Geom.) (a) A solid formed by the revolution of a conic section about its axis; as, a parabolic conoid, elliptic conoid, etc.; -- more commonly called paraboloid, ellipsoid, etc. (b) A surface which may be generated by a straight line moving in such a manner as always to meet a given straight line and a given curve, and continue parallel to a given plane.
      Math. Dict.

      1913 Webster
    
      
    
  2.       

    Conoid a. Resembling a cone; conoidal.
    1913 Webster