Source : Webster's Revised Unabridged Dictionary (1913)

Lentiform \Len"ti*form\ (l[e^]n"t[i^]*f[^o]rm), a. [L. lens,
   lentis, lentil + -form: cf. F. lentiforme.]
   Lenticular.

Source : WordNet®

lentiform
     adj : convex on both sides; lentil-shaped [syn: {biconvex}, {convexo-convex},
            {lenticular}]