| 单词 | cone |
| 释义 | cone /kohn/, n. , v. , coned, coning. n. 1. Geom. a. 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. b. a plane surface resembling the cross section of a solid cone. 2. anything shaped like a cone: sawdust piled up in a great cone; the cone of a volcano. 3. See ice-cream cone. 4. Bot. a. 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. b. a similar fruit, as in cycads or club mosses. 5. Anat. one of the cone-shaped cells in the retina of the eye, sensitive to color and intensity of light. Cf. rod (def. 17). 6. one 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. 7. (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. 8. Ceram. See pyrometric cone. v.t. 9. to shape like a cone or a segment of a cone. [1480-90; < L conus < Gk kônos pine-cone, cone-shaped figure; akin to HONE1] |
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