mother of thousands noun5 •Any member of species Kalanchoe delagoensis (syn. Bryophyllum delagoense) of succulent plants native to Madagascar. •Any member of species Saxifraga stolonifera (creeping saxifrage). •Any member of species Soleirolia soleirolii (baby's tears), in the nettle family. •Any member of species Cymbalaria muralis (ivy-leaved toadflax). •Any member of species Kalanchoe pinnata (air plant (US))