Thomism
Concise Oxford English Dictionary © 2008 Oxford University Press:
Thomism /ˈtəʊmɪz(ə)m/
▶noun the theology and philosophy of St Thomas Aquinas (1225–74), the foremost figure of scholasticism, or of his followers.
– derivatives
Thomist noun & adjective,
Thomistic adjective.
Thomist noun & adjective,
Thomistic adjective.
'Thomism' also found in these Oxford entries:

