Synonyms for Biconvex:

adj.

all (adjective)
lentiform, lenticular, convexo-convex.
convex (adjective)
bulging.

n.

biconvex (noun)
convex, lentiform, bulging, lenticular, convexo-convex.

Other synonyms:

adj.
convex.
n.
convexo-convex, lenticular, lentiform.