Cone

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GRE TOEFL

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[编辑] GRE 红宝书

  • n. 松果; 圆锥体
  • [英] n. 松果; 圆锥体 ( solid body that narrows to a point from a circular flat base)

[编辑] Webster Collegiate

I. noun

  • Etymology: Middle French or Latin; Middle French, from Latin conus, from Greek kōnos
  • Date: 1545
  • 1.
    • a. a solid generated by rotating a right triangle about one of its legs — called also right circular cone
    • b. a solid bounded by a circular or other closed plane base and the surface formed by line segments joining every point of the boundary of the base to a common vertex — see volume table
    • c. a surface traced by a moving straight line passing through a fixed vertex
  • 2.
    • a. a mass of ovule-bearing or pollen-bearing scales or bracts in most conifers or in cycads that are arranged usually on a somewhat elongated axis
    • b. any of several flower or fruit clusters suggesting a cone
  • 3. something that resembles a cone in shape: as
    • a. any of the conical photosensitive receptor cells of the vertebrate retina that function in color vision — compare rod 3
    • b. any of a family (Conidae) of tropical marine gastropod mollusks that inject their prey with a potent toxin
    • c. the apex of a volcano
    • d. a crisp usually cone-shaped wafer for holding ice cream

II. transitive verb (coned; coning)

  • Date: 1845
  • 1. to make cone-shaped
  • 2. to bevel like the slanting surface of a cone <cone a tire


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