Not focused straight at the target or subject, but by more subtle means
Not of obvious or immediate cause, but as a secondary result
Not involving the quickest, shortest, or most convenient path
An indirect cost.
An indirect radiator
To access by means of indirection; to dereference.
at or forming a right angle (to something).
Exactly upright; extending in a straight line toward the centre of the earth, etc.
Independent of or irrelevant to each other; orthogonal.
A line or plane that is perpendicular to another.
A device such as a plumb line that is used in making or marking a perpendicular line.