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.
An exception, or something having an exceptional value
having a ratio that is not expressible as a fraction of two integers.
Not able to be measured by the same standards as another term in the context.
having no common integer divisor except 1.
An incommensurable value or quantity; an irrational number.