The trikāya doctrine teaches that a buddha has three bodies: the dharmakāya, the ultimate reality or truth body; the saṃbhogakāya, the glorious form in which buddhas appear to bodhisattvas in pure lands; and the nirmāṇakāya, the emanation that appears in the world, as Śākyamuni did.
Three bodies of the Buddha
The dharma body, the enjoyment body and the emanation body: the Mahāyāna doctrine of the Buddha’s nature.
Also: trikaya