marginicidal

from The Century Dictionary.

• In botany, a term descriptive of that mode of dehiscence in which the carpels separate along their external line of junction, not, however, splitting the septa or partitions, as in septicidal dehiscence, but breaking away from them.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Bot.) Dehiscent by the separation of united carpels; -- said of fruits.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective of fruits dehiscent by the separation of united carpels.