noun ephedra An evergreen shrub of warm, arid regions that has trailing or climbing stems and tiny, scalelike leaves . Some kinds are a source of ephedrine and are used medicinally. 1
noun ephedra any gymnosperm shrub of the genus Ephedra, of warm regions of America and Eurasia: the source of ephedrine: family Ephedraceae, phylum Gnetophyta 0
