Convex on both sides; shaped like a lentil.

synonyms: biconvex, convexo-convex, lenticular.

Roget 245: curved etc. v.; curviform^†, curvilineal^†, curvilinear; devex^†, devious; recurved, recurvous^†; crump^†; bowed etc. v.; vaulted, hooked; falciform^†, falcated^†; semicircular, crescentic; sinusoid [Geom.], parabolic, paraboloid; luniform^†, lunular^†; semilunar, conchoidal^†; helical, double helical, spiral; kinky; cordiform^†, cordated^†; cardioid; heart shaped, bell shaped, boat shaped, crescent shaped, lens shaped, moon shaped, oar shaped, shield shaped, sickle shaped, tongue shaped, pear shaped, fig shaped; kidney-shaped, reniform; lentiform^†, lenticular; bow-legged etc. (distorted) 243; oblique etc. 217; circular etc. 247.    aduncated^†, arclike^†, arcuate, arched, beaked; bicorn^†, bicornuous^†, bicornute^†; clypeate^†, clypeiform^†; cymbiform^†, embowed^†, galeiform^†; hamate^†, hamiform^†, hamous^†; hooked; linguiform^†, lingulate^†; lobiform^†, lunate, navicular^†, peltate^†, remiform^†, rhamphoid^†; rostrate^†, rostriferous^†, rostroid^†; scutate^†, scaphoid^†, uncate^†; unguiculate^†, unguiform^†.    ... show more

Roget 250: convex, prominent, protuberant, projecting etc. v.; bossed, embossed, bossy, nodular, bunchy; clavate, clavated^†, claviform; hummocky^†, moutonne^†, mammiliform^†; papulous^†, papilose^†; hemispheric, bulbous; bowed, arched; bold; bellied; tuberous, tuberculous; tumous^†; cornute^†, odontoid^†; lentiform^†, lenticular; gibbous; club shaped, hubby [U.S.], hubbly [U.S.], knobby, papillose, saddle-shaped, selliform^†, subclavate^†, torose^†, ventricose^†, verrucose^†.    salient, in relief, raised, repousse; bloated &c., (expanded) 194.    ... show more

Polish: soczewicowaty, soczewkowaty