epithema
noun
ep·i·the·ma
ˌepəˈthēmə,
ə̇ˈpithəmə
plural epithemata
-thēmətə,
-them-
: a horny excrescence on the bill of some birds (such as the casque of a hornbill)
Word History
Etymology
New Latin, from Greek epithema something put on, from epitithenai