in·ter·jec·tion·al /-ʃnəl, ʃənḷ/
1. Thrown in between other words or phrases; parenthetical; ejaculatory; as, an interjectional remark.
2. Pertaining to, or having the nature of, an interjection; consisting of natural and spontaneous exclamations.
Certain of the natural accompaniments of interjectional speech, such as gestures, grimaces, and gesticulations, are restrained by civilization. --Earle.