Digression
Digression , noun
[Latin digressio: compare French digression.]
1.
The act of digressing or deviating, esp. from the main subject of a discourse; hence, a part of a discourse deviating from its main design or subject.
The digressions I can not excuse otherwise, than by the confidence that no man will read them.
2.
A turning aside from the right path; transgression; offense. [Rare]
Then my digression is so vile, so base,
That it will live engraven in my face.
3.
(Anatomy) The elongation, or angular distance from the sun; -- said chiefly of the inferior planets. [Rare]