My botanical reference to the Crassulaceae uses the word bulbil with Kalanchoe (among various others) so I think it has come to refer to various types of vegetative outgrowths (specifically plantlets that fall and root and clonally reproduce the mother plant), whether bulb-shaped or not, from the axils on an inflorescence (as on agaves or aloes) or from the margins of leaves (as on some Kalanchoes) or wherever.
