Sharing divine nature or attributes equally with another, particularly used in theological contexts to describe the relationship between Christ and God the Father.
From co- (together, jointly) + divine (from Latin divinus, godlike). The prefix co- combines with divine to indicate a shared or joint divine quality.
This word emerged in Christian theological debates where church scholars needed precise language to describe whether Christ was equally divine or subordinate to God. It's a perfect example of how religious argument actually shaped English vocabulary.
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