| 单词 | cone |
| 释义 | Word Frequency cone(kəʊn) noun 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:1⁄3π 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: strobilus4. 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 verb 6. (transitive) to shape like a cone or part of a cone Word origin C16: from Latin cōnus, from Greek kōnus pine cone, geometrical cone |
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