(chiefly in the plural) Something incidental to the main subject, but of less importance.
the circumstantials of religion
Pertaining to or dependent on circumstances, especially as opposed to essentials; incidental, not essential.
Abounding with minor circumstances; in great detail; particular.
Full of circumstance or pomp; ceremonial.
Suggesting guilt, but not proving it conclusively.
It is unlikely he will be convicted; the evidence against him is circumstantial at best.