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.
To mediate, to be an intermediate.
To arrange, in the manner of a broker.
Any substance formed as part of a series of chemical reactions that is not the end-product.
An intermediary.
Anything in an intermediate position.
Being between two extremes, or in the middle of a range.