What does bulbous mean?
Bulbous is an adjective describing something that is swollen, rounded, and bulging in shape, much like a plant bulb. It is most often used in physical description — a bulbous nose, bulbous eyes, a bulbous growth — where it conveys a sense of pronounced roundness, sometimes with a faintly comic or unflattering edge. Beyond human features, it appears in technical registers: ships may have a bulbous bow below the waterline to reduce drag, and botanists describe plants as bulbous when they grow from or produce bulbs, as tulips and onions do. The word derives from the Latin bulbus, itself borrowed from the Greek bolbos meaning a bulbous plant or onion, and its relatives include the everyday noun bulb and the diminutive bulblet. Because it paints an instantly vivid picture of swelling roundness, bulbous is a compact and expressive choice whenever plain adjectives like big or round feel too vague.
Shaped like or resembling a bulb; swollen and rounded.
"The character was drawn with a bulbous belly and tiny legs."
Often slightly humorous or unflattering when applied to body parts.
Relating to, producing, or growing from bulbs.
"Daffodils are among the most popular bulbous plants in temperate gardens."
Chiefly botanical usage.
The word 'bulb' traveled from Greek through Latin before ever describing a plant — botanists borrowed it because an onion's swollen base looked just like the shape itself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bulbous
Bulbous comes from the Latin bulbus, which in turn was borrowed from the ancient Greek bolbos, meaning a bulbous plant such as an onion. The English adjective emerged in the late sixteenth century, formed by adding the Latinate suffix -ous to bulb, and originally carried strong botanical associations before extending to anything swollen or bulge-shaped. Cognates and derivatives sharing this root include bulb, bulblet, and the anatomical term bulbar.
Related word forms
How bulbous is actually used
Neutral to mildly descriptive in tone; often used in physical description (noses, eyes, shapes) where it can sound slightly comic or unflattering, and in technical contexts such as ship design ('bulbous bow') and botany.
Easily confused with bulbous
Bullous is a medical term meaning characterized by blisters (bullae), whereas bulbous simply means swollen or bulb-shaped.