An exception, or something having an exceptional value
Corresponding to something of lower dimension under a birational correspondence.
Forming an exception; not ordinary; uncommon; rare.
Better than the average; superior due to exception or rarity.
Something that is different from others in the same category; odd one out.
Someone who lacks a partner or team.
A temporary crew member who joins a mission with an established crew.
An eccentric; weirdo.