honorarium
Concise Oxford English Dictionary © 2008 Oxford University Press:
honorarium /ˌɒnəˈrɛːrɪəm/
▶noun (pl. honorariums or honoraria /-rɪə/) a nominal payment for professional services.
– origin C17: from L., denoting a gift made on being admitted to public office, from honorarius (see honorary).
'honorarium' also found in these Oxford entries:

