Definition of "acroscopic"

Of more significance in the nature of branch development; in the Jubulaceae, as in the Porellaceae, branches are acroscopic and normally replace a ventral leaf lobe.

1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, page 5