lith·o·phyte \ˈlithəˌfīt\noun (-s) Etymology: French, from lith- + -phyte 1.archaic: a plant or a plantlike organism having a hard stony structure or skeleton 2.: a plant or a plantlike organism that grows on the surface of rocks • lith·o·phyt·ic\| ̷ ̷ ̷ ̷|fid.ik\adjective