vi·va vo·ce
Pronunciation: \ˌvī-və-ˈvō-(ˌ)sē or ˌvē-və-ˈvō-(ˌ)chā\
Function: adverb
Etymology: Medieval Latin, with the living voice
Date: 1563
: by word of mouth : orally

Function: adjective
Date: 1654
: expressed or conducted by word of mouth : oral

Function: noun
Date: 1842
: an examination conducted viva voce —called also viva

from a synopsis found in a seminar handout