Quick'en tree` [ Probably from quick , and first applied to the aspen or some tree with quivering leaves; confer German quickenbaum , quizenbaum , quitschenbaum . Confer Quitch grass .] (Botany) The European rowan tree; -- called also quickbeam , and quickenbeam . See ... Found on http://www.encyclo.co.uk/webster/Q/9