Minor items, not further defined. Incidental expense.
Something that is incidental.
Entering or approaching, prior to reflection (more frequently incident).
Occurring by chance.
Existing tangentially, being a byproduct, a tangent, or a likely consequence.
Loosely associated; of limited relevance except indirectly; only accidentally related.
A minor detail, rule, law, etc., seemingly insignificant to a non-specialist but which has significant consequences in larger matters.
That which is technical, or peculiar to any trade, profession, sect, or the like.
The quality or state of being technical.