Antonyms of adj lentiform

1 sense of lentiform

Sense 1
biconvex, convexo-convex, lenticular, lentiform -- (convex on both sides; shaped like a lentil)

INDIRECT (VIA convex) -> concave -- (curving inward)

Similarity of adj lentiform

1 sense of lentiform

Sense 1
biconvex, convexo-convex, lenticular, lentiform -- (convex on both sides; shaped like a lentil)
       => convex (vs. concave), bulging -- (curving or bulging outward)