Asṭurlāb(4,885 words)

or aṣṭurlāb (Ar.; on the vocalization see also Ibn Ḵh̲allikān, no. 779; idem, Būlāḳ, no. 746), Astrolabe. The word was derived from the Greek ἀστρολάβος or ἀστρολάβον (ὄργανον), name of several astronomical instruments serving various theoretical and practical purposes, such as the demonstration and graphical solution of many problems of spherical astronomy, the measuring of altitudes, the determination of the hour of the day and the night, and the casting of horoscopes. In Arabic the word Asṭurlāb when used alone always means the flat or planispheric…

Cite this page
"Asṭurlāb." Encyclopaedia of Islam, Second Edition. Edited by: P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel, W.P. Heinrichs. Brill Online, 2014. Reference. 28 July 2014 <http://referenceworks.brillonline.com/entries/encyclopaedia-of-islam-2/asturlab-COM_0071>
First appeared online: 2012
First Print Edition: isbn: 9789004161214, 1960-2007



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