'wall fern' definitions:
Definition of 'wall fern'
From: WordNet
noun
Mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia [syn: common polypody, adder's fern, wall fern, golden maidenhair, golden polypody, sweet fern, Polypodium vulgare]