A minor related mention, an afterthought.
An incidental remark to a person next to one made discreetly but not in private, audible only to that person.
A brief comment by a character addressing the audience, unheard by other characters.
aside from
To or on one side so as to be out of the way.
Not in perfect symmetry; distorted laterally, especially of the human body.
Digression.
Ratiocination; step-by-step philosophical reasoning, as opposed to intuition.