Synset
a shape that curves or bends inward
<noun.shape>
concave shape
concavity
incurvation
incurvature
lexical pointers
derivationally related form
concave
lexical pointers
derivationally related form
incurvate
incurvate
semantic pointers
hypernym
solid
hyponym
dome
pit, fossa
corner, niche, recess, recession
bowl, trough
scoop, pocket
depression, impression, imprint
cup
indentation, indenture