Cone



GRE TOEFL

解释

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)

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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