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cone off
cone shell

cone 
  n 
1 
a a geometric solid consisting of a plane base bounded by a closed curve, usually a circle or an ellipse, every point of which is joined to a fixed point, the vertex, lying outside the plane of the base. A right circular cone has a vertex perpendicularly above or below the centre of a circular base. Volume of a cone: 1/3 <Gpi>r2h, where r is the radius of the base and h is the height of the cone 
b a geometric surface formed by a line rotating about the vertex and connecting the peripheries of two closed plane bases, usually circular or elliptical, above and below the vertex 
 See also  →  conic section 
2 anything that tapers from a circular section to a point, such as a wafer shell used to contain ice cream 
3 
a the reproductive body of conifers and related plants, made up of overlapping scales, esp. the mature female cone, whose scales each bear a seed 
b a similar structure in horsetails, club mosses, etc., (Technical name)  strobilus 
4 a small cone-shaped bollard used as a temporary traffic marker on roads 
5  (Also called)  retinal cone any one of the cone-shaped cells in the retina of the eye, sensitive to colour and bright light 
  vb 
6 tr to shape like a cone or part of a cone 
  (C16: from Latin conus, from Greek konus pine cone, geometrical cone) 



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