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Paragogical | { } a. [ Cf. F. paragogique. ] Of, pertaining to, or constituting, a paragoge; added to the end of, or serving to lengthen, a word. [ 1913 Webster ] Paragogic letters, in the Semitic languages, letters which are added to the ordinary forms of words, to express additional emphasis, or some change in the sense. [ 1913 Webster ] Variants: Paragogic | Parabolical | { } a. [ Gr. paraboliko`s figurative: cf. F. parabolique. See Parable. ] [ 1913 Webster ] 1. Of the nature of a parable; expressed by a parable or figure; allegorical; as, parabolical instruction. [ 1913 Webster ] 2. [ From Parabola. ] (Geom.) (a) Having the form or nature of a parabola; pertaining to, or resembling, a parabola; as, a parabolic curve. (b) Having a form like that generated by the revolution of a parabola, or by a line that moves on a parabola as a directing curve; as, a parabolic conoid; a parabolic reflector; a parabolic antenna. [ 1913 Webster +PJC ] Parabolic conoid, a paraboloid; a conoid whose directing curve is a parabola. See Conoid. -- Parabolic mirror (Opt.), a mirror having a paraboloidal surface which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes. -- Parabolic spindle, the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line as an axis. -- Parabolic spiral, a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve having an analogy to the parabola. [ 1913 Webster ] Variants: Parabolic | Parabolically | adv. 1. By way of parable; in a parabolic manner. [ 1913 Webster ] 2. In the form of a parabola. [ 1913 Webster ] |
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| | | | | | | | Parabolical | { } a. [ Gr. paraboliko`s figurative: cf. F. parabolique. See Parable. ] [ 1913 Webster ] 1. Of the nature of a parable; expressed by a parable or figure; allegorical; as, parabolical instruction. [ 1913 Webster ] 2. [ From Parabola. ] (Geom.) (a) Having the form or nature of a parabola; pertaining to, or resembling, a parabola; as, a parabolic curve. (b) Having a form like that generated by the revolution of a parabola, or by a line that moves on a parabola as a directing curve; as, a parabolic conoid; a parabolic reflector; a parabolic antenna. [ 1913 Webster +PJC ] Parabolic conoid, a paraboloid; a conoid whose directing curve is a parabola. See Conoid. -- Parabolic mirror (Opt.), a mirror having a paraboloidal surface which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes. -- Parabolic spindle, the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line as an axis. -- Parabolic spiral, a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve having an analogy to the parabola. [ 1913 Webster ] Variants: Parabolic | Parabolically | adv. 1. By way of parable; in a parabolic manner. [ 1913 Webster ] 2. In the form of a parabola. [ 1913 Webster ] |
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