planispheric alidade
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Mariner's astrolabe — Three Mariner s Astrolabes in the Museum of the Forte da Ponta da Bandeira; Lagos, Portugal This article is about the Mariner s astrolabe. For the Planispheric astrolabe, see Astrolabe. The mariner s astrolabe, also called sea astrolabe, was an… … Wikipedia
astrolabe — astrolabical /as treuh lab i keuhl, lay bi /, adj. /as treuh layb /, n. an astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from… … Universalium
