Source : Webster's Revised Unabridged Dictionary (1913)

Bulbous \Bulb"ous\, a. [L. bulbosus: cf. F. bulbeux. See {Bulb},
   n.]
   Having or containing bulbs, or a bulb; growing from bulbs;
   bulblike in shape or structure.

Source : WordNet®

bulbous
     adj 1: like a bulb [syn: {bulblike}]
     2: curving outward [syn: {bellied}, {bellying}, {bulging}, {bulgy},
         {protuberant}]