Bhava-cakka, 'wheel of existence', or of life, is a name for 'dependent origination' (s. paṭiccasamuppāda).

See The Buddhist Wheel Symbol, by T. B. Karuṇaratane (WHEEL 137/138); The Wheel of Birth and Death, by Bhikkhu Khantipālo (WHEEL 147/149)

Buddhist Dictionary, Manual of Buddhist Terms and Doctrines, by NYANATILOKA MAHATHERA