'Consubstantial' definitions:

Definition of 'consubstantial'

From: WordNet
adjective
Regarded as the same in substance or essence (as of the three persons of the Trinity)

Definition of 'Consubstantial'

From: GCIDE
  • Consubstantial \Con`sub*stan"tial\, a. [L. consubstantialis; con- + substantialis: cf. F. consubstantiel. See Substantial.] Of the same kind or nature; having the same substance or essence; coessential. [1913 Webster]
  • Christ Jesus . . . coeternal and consubstantial with the Father and with the Holy Ghost. --Foxe. [1913 Webster]