p 3 l 1 e 1 n 1 u 1 m 3
6 letters · 10 points in Scrabble
Meaning
noun a meeting of a legislative body at which all members are present
noun an enclosed space in which the air pressure is higher than outside
originFrom Latin plēnum n (“space filled with matter”), from plēnus (“full”). The sense of "legislative meeting" is a semantic loan from Russian пле́нум (plénum, “plenary session”), from the same Latin source.
Etymology from Wiktionary, CC BY-SA 3.0