excurrent

adjective2

1. •
   Carrying outward; permitting outward flow.

   • The excurrent apertures (called oscula because they look like little mouths) project their thin cone-shaped lips into the water stream passing over a sponge. — 2001
2. •
   Of a vein or costa, extending beyond the tip or the margin of a leaf.

   • This species of tree is recognized by the excurrent veins in its leaves.