homoiousian

adj

1. (not-comparable)Having a similar but not identical essence, especially with reference to the first and second persons of the Trinity.

   “Human ill-nature needs but some Homoiousian iota, or even the pretence of one; and will flow copiously through the eye of a needle: thus always must mortals go jargoning and fuming […].”

noun

1. (historical)One of the Semi-Arians of the 4th century who held that the Son was of like, but not the same, essence or substance with the Father.

   “The Greek word, which was chosen to express this mysterious resemblance, bears so close an affinity to the orthodox symbol, that the profane of every age have derided the furious contests which the difference of a single diphthong excited between the Homoousians and the Homoiousians.”