- bulbThe bulb-shaped underground portion of a plant such as a tulip, consisting of a shortened stem and many fleshy scale leaves, from which the rest of the plant may be regrown.
- bulbiformShaped like a bulb.
- bulbilA bulb-shaped bud in the place of a flower or in a leaf axil.
- bulbusBulb (e.g., flower bulb, body part).