| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024cone /koʊn/USA pronunciation n. [countable]- Mathematicsa solid in which the bottom or base is a circle and the sides are smooth, curved lines narrowing to a point at the top.
- anything shaped like a cone: the cone of a volcano.
- Botanythe seed-bearing structure of certain trees, such as the pine.
WordReference Random House Unabridged Dictionary of American English © 2024cone (kōn),USA pronunciation n., v., coned, con•ing. n. - Mathematics[Geom.]
- 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.
- See ice-cream cone.
- [Bot.]
- Botanythe more or less conical multiple fruit of the pine, fir, etc., consisting of overlapping or valvate scales bearing naked ovules or seeds;
a strobile. - Botanya similar fruit, as in cycads or club mosses.
- Anatomyone of the cone-shaped cells in the retina of the eye, sensitive to color and intensity of light. Cf. rod (def. 17).
- Transportone of a series of cone-shaped markers placed along a road, as around an area of highway construction, esp. to exclude or divert motor vehicles.
- Mechanical Engineering(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.
- CeramicsSee pyrometric cone.
v.t. - to shape like a cone or a segment of a cone.
- Greek kônos pine-cone, cone-shaped figure; akin to hone1
- Latin cōnus
- 1480–90
Collins Concise English Dictionary © HarperCollins Publishers:: cone /kəʊn/ n - 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
- 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
Also called: retinal cone any one of the cone-shaped cells in the retina of the eye, sensitive to colour and bright light
vb - (transitive) to shape like a cone or part of a cone
Etymology: 16th Century: from Latin cōnus, from Greek kōnus pine cone, geometrical cone |