| 单词 | paraboloidal |
| 例句 | These reflectors were formed of facets of mirror-glass placed in hollow paraboloidal moulds of plaster. The Sea: Its Stirring Story of Adventure, Peril, & Heroism. Volume 2 2012-04-03T02:00:36.237Z Similiar paraboloidal forms had, nevertheless, occasionally been seen to make an integral part of earlier coronas; and it remains extremely doubtful whether Schaeberle's "eclipse-comet" was justly entitled to the character claimed for it. A Popular History of Astronomy During the Nineteenth Century Fourth Edition The central rays of light are blocked out by means of an opaque stop while the peripheral rays are reflected from the paraboloidal sides of the condenser and refracted by the object viewed. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Its upper surface is paraboloidal in shape, as a spherical surface will not unite in a sharp focus the rays coming from a distant object. The New Heavens In Thomson's improved form this is accomplished in a novel manner by making the pole of the magnet paraboloidal in form, and making an opening in the movable armature to encircle said pole. Scientific American Supplement, No. 388, June 9, 1883 It consists essentially of a resonant vessel, usually of paraboloidal form, closed at one end by a flexible membrane. The Gutenberg Webster's Unabridged Dictionary Section P and Q |
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