The Collaborative International Dictionary
brood bud
Bulbil \Bulb"il\, n. [Dim. fr. bulb.]
(Bot.) A small or secondary bulb; hence, now almost exclusively: An a["e]rial bulb or deciduous bud, produced in the leaf axils, as in the tiger lily, or relpacing the flowers, as in some onions, and capable, when separated, of propagating the plant; -- called also bulblet and brood bud.
(Anat.) A small hollow bulb, such as an enlargement in a small vessel or tube.