bulbo-

(Greek > Latin: onion, bulbous root, bulb; ball-shaped part of the stem of certain plants; such as, onions, tulips etc, from which their roots grow)

bulbaceous
Producing or growing from bulbs.
bulboid, bulbiform
Shaped like a bulb.
bulbous
1. Resembling a bulb in shape; rounded or swollen; such as, a bulbous nose or a bulbous stem base.
2. Plants bearing bulbs or growing from a bulb.
bulbus
An anatomic nomenclature for a rounded mass or enlargement.
olfactory bulb (s) (noun), olfactory bulbs (pl)
1. One of two enlargements at the terminus of the olfactory nerve at the base of the brain just above the nasal cavities.
2. A key part of the olfactory apparatus consisting of a bulbous enlargement of the end of the olfactory nerve on the under surface of the frontal lobe of each cerebral hemisphere of the brain just above the nasal cavity.