- Geometry.
- a solid whose surface is generated by a line passing through a fixed point and a fixed plane curve not containing the point, consisting of two equal sections joined at a vertex.
- a plane surface resembling the cross section of a solid cone.
- anything shaped like a cone: sawdust piled up in a great cone; the cone of a volcano.
- ice-cream cone.
- Botany.
- the more or less conical multiple fruit of the pine, fir, etc., consisting of overlapping or valvate scales bearing naked ovules or seeds; a strobile.
- a similar fruit, as in cycads or club mosses.
- one of the cone-shaped cells in the retina of the eye, sensitive to color and intensity of light.
- one of a series of cone-shaped markers placed along a road, as around an area of highway construction, especially to exclude or divert motor vehicles.
- (in a taper thread screw or bevel gear) an imaginary cone or frustum of a cone concentric to the axis and defining the pitch surface or one of the extremities of the threads or teeth.
- pyrometric cone.
- to shape like a cone or a segment of a cone.
- 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: 1/3 π r ² h, where r is the radius of the base and h is the height of the cone
- 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
- anything that tapers from a circular section to a point, such as a wafer shell used to contain ice cream
- the reproductive body of conifers and related plants, made up of overlapping scales, esp the mature female cone, whose scales each bear a seed
- a similar structure in horsetails, club mosses, etc
- a small cone-shaped bollard used as a temporary traffic marker on roads
- any one of the cone-shaped cells in the retina of the eye, sensitive to colour and bright light
- to shape like a cone or part of a cone