a hoverfly the larvae of which live in bulbs and can become ser ious pests, esp the yellow and black narcissus bulb fly (Meridon equestris)
a narrow keel having a swelling weight of lead or iron at the bottom.
noun a widespread mite, Rhizaglophus eclinops, that tunnels in the bulbs of lilies and other plants
bulb of corpus spongiosum
bulb of eye