viva
Concise Oxford English Dictionary © 2008 Oxford University Press:
viva1 /ˈvʌɪvə/ Brit.
▶noun an oral examination, typically for an academic qualification. ▶verb (vivas, vivaing, vivaed /-vəd/ or viva'd) subject to a viva.
– origin abbrev. of viva voce.
Concise Oxford English Dictionary © 2008 Oxford University Press:
viva2 /ˈviːvə/
▶exclamation long live! (used to express acclaim or support).
– origin from Ital.
'viva' also found in these Oxford entries:

