\In`tra*pet"i*o*lar\, a. (Bot.)
Situated between the petiole and the stem; -- said of the
pair of stipules at the base of a petiole when united by
those margins next the petiole, thus seeming to form a single
stipule between the petiole and the stem or branch; -- often
confounded with interpetiolar, from which it differs
essentially in meaning.