adj. Of a symptom, generally, but not always, accompanying a disease; indicative of the presence of a disease but not a necessary occurrence in conjunction with that disease.
the GNU version of the Collaborative International Dictionary of English
adj. Usually attending a disease, but not always.
The Century Dictionary and Cyclopedia
Accompanying; concomitant.
Word Usage
"That was the night of my assident ... err ... accident and how that scar got there."