aether

[ee-ther]

noun

(initial capital letter) the ancient Greek personification of the clear upper air of the sky.

Related formsae·the·re·al [ih-theer-ee-uh l] /ɪˈθɪər i əl/, ae·ther·ic [ih-ther-ik] /ɪˈθɛr ɪk/, adjective
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British Dictionary definitions for aetheric

aether

noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012