COLLOQUIUM
colloquium
(noun) an address to an academic meeting or seminar
colloquium
(noun) an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting
Source: WordNet® 3.1
Etymology
Noun
colloquium (plural colloquiums or colloquia)
A colloquy; a meeting for discussion.
An academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting.
An address to an academic meeting or seminar.
(legal) That part of the complaint or declaration in an action for defamation which shows that the words complained of were spoken concerning the plaintiff.
Usage notes
Note that while colloquial refers specifically to informal conversation, colloquy and colloquium refer instead to formal conversation.
Source: Wiktionary