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cone
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 vertex2 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 cone3: 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
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