ə̇ˈrəmpənt, ēˈ- adjective
Etymology: Latin erumpent-, erumpens, present participle of erumpere
1. : tending to grow out vigorously from a substrate so as to burst through or rise above its surface
certain erumpent fungi that parasitize leaves
2. of the fruiting bodies of some fungi and algae : grown or burst through a surface (as of a host's tissue) so as to form a projecting mass
the erumpent fruiting bodies of some rusts
erumpent acervuli forming black dots on the leaves