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Particularity!

par�tic�u�lar�i�ty
n. pl. par�tic�u�lar�i�ties
The quality or state of being particular rather than general.
Exactitude of detail, especially in description: a travel account written with almost excruciating particularity.
Attention to or concern with detail; fastidiousness: a scholar known for her particularity.
A specific point or detail; a particular.
An individual characteristic; a peculiarity

[from Dictionary.com ]