Contradictory Term, Like Jumbo Shrimp
Puzzle 10 of Alternatives to Plastic Pack
Question is: Contradictory Term, Like Jumbo Shrimp
and the answer is: OXYMORON
Word Meaning:
OXYMORON — (rhetoric) A figure of speech in which two words or phrases with opposing meanings are used together intentionally for effect.
Definitions from Wiktionary.