odder

adjective

1. Differing from what is usual, ordinary or expected.“She slept in, which was very odd.”
2. Without a corresponding mate in a pair or set; unmatched; (of a pair or set) mismatched.“My cat Fluffy has odd eyes: one blue and one brown.”
3. Left over, remaining after the rest have been paired or grouped.“I'm the odd one out.”
4. Left over or remaining (as a small amount) after counting, payment, etc.