|1.||a. a geometric solid consisting of a plane base bounded by a closed curve, often 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: 1⁄3πr²h, where r is the radius of the base and h is the height of the cone|
|b. See also conic section 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|
|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. Technical name: strobilus a similar structure in horsetails, club mosses, etc|
|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|
|6.||(tr) to shape like a cone or part of a cone|
|[C16: from Latin cōnus, from Greek kōnus pine cone, geometrical cone]|
A solid body having a circle for its base and sides inclined so as to meet at a point above the base.
See cone cell.
|cone (kōn) Pronunciation Key
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