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Homoousian

[hoh-moh-oo-see-uh n, -ou-, hom-oh-]
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noun
  1. a member of a 4th-century a.d. church party that maintained that the essence or substance of the Father and the Son is the same (opposed to Heteroousian).
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adjective
  1. of or relating to the Homoousians or their doctrine.
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Origin of Homoousian

1555–65; < Late Greek homooúsi(os) of the same substance (Greek hom(o)- homo- + ousí(a) substance, essence + -os adj. suffix) + -an
Related formsHo·mo·ou·si·an·ism, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for homoousian

Homoousian

noun
  1. a Christian who believes that the Son is of the same substance as the FatherCompare Homoiousian
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adjective
  1. of or relating to the Homoousians
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Derived FormsHomoousianism, noun

Word Origin

C16: from Late Greek homoousios of the same substance, from Greek homo- + ousia nature
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