cone

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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