| Word | Definitions | Synonyms |
|---|---|---|
| biconvex | (adjective) convex on both sides; shaped like a lentil | Synonyms: convexo-convex, lenticular, lentiform |
| convex | (adjective) curving or bulging outward | Synonyms: bulging |
| planoconvex | (adjective) flat on one side and convex on the other | - |