- concave hyperboloid
- <astron> ■ hyperbolischer Hohlspiegel m
English-german technical dictionary. 2013.
English-german technical dictionary. 2013.
Oblate spheroidal coordinates — Figure 1: Coordinate isosurfaces for a point P (shown as a black sphere) in oblate spheroidal coordinates (μ, ν, φ). The z axis is vertical, and the foci are at ±2. The red oblate spheroid (flattened sphere) corresponds to μ=1, whereas the blue… … Wikipedia
History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… … Wikipedia
Timeline of telescope technology — Timeline of telescope technology* c.2560 BC c.860 BC Egyptian artisans polish rock crystal, semi precious stones, and latterly glass to produce facsimile eyes for statuary and mummy cases. The intent appears to be to produce an optical illusion.… … Wikipedia
Vault (architecture) — A Vault (French. voute, Italian. volta, German. Gewölbe, Polish. sklepienie , Spanish. bóveda ) is an architectural term for an arched form used to provide a space with a ceiling or roof. url=http://concise.britannica.com/ebc/article… … Wikipedia
Circle of the gorge — Gorge Gorge, n. [F. gorge, LL. gorgia, throat, narrow pass, and gorga abyss, whirlpool, prob. fr. L. gurgea whirlpool, gulf, abyss; cf. Skr. gargara whirlpool, g[.r] to devour. Cf. {Gorget}.] 1. The throat; the gullet; the canal by which food… … The Collaborative International Dictionary of English
Gorge — Gorge, n. [F. gorge, LL. gorgia, throat, narrow pass, and gorga abyss, whirlpool, prob. fr. L. gurgea whirlpool, gulf, abyss; cf. Skr. gargara whirlpool, g[.r] to devour. Cf. {Gorget}.] 1. The throat; the gullet; the canal by which food passes to … The Collaborative International Dictionary of English
Gorge circle — Gorge Gorge, n. [F. gorge, LL. gorgia, throat, narrow pass, and gorga abyss, whirlpool, prob. fr. L. gurgea whirlpool, gulf, abyss; cf. Skr. gargara whirlpool, g[.r] to devour. Cf. {Gorget}.] 1. The throat; the gullet; the canal by which food… … The Collaborative International Dictionary of English
Gorge fishing — Gorge Gorge, n. [F. gorge, LL. gorgia, throat, narrow pass, and gorga abyss, whirlpool, prob. fr. L. gurgea whirlpool, gulf, abyss; cf. Skr. gargara whirlpool, g[.r] to devour. Cf. {Gorget}.] 1. The throat; the gullet; the canal by which food… … The Collaborative International Dictionary of English
Gorge hook — Gorge Gorge, n. [F. gorge, LL. gorgia, throat, narrow pass, and gorga abyss, whirlpool, prob. fr. L. gurgea whirlpool, gulf, abyss; cf. Skr. gargara whirlpool, g[.r] to devour. Cf. {Gorget}.] 1. The throat; the gullet; the canal by which food… … The Collaborative International Dictionary of English
Saddle roof — A saddle roof is one which follows a convex curve about one axis and a concave curve about the other. The hyperbolic paraboloid form has been used for roofs at various times since it is easily constructed from straight sections of lumber, steel,… … Wikipedia