WordNet: concave shape, concavity, incurvation, incurvature

a shape that curves or bends inward

• hypernym solid

• hyponym dome

• hyponym fossa, pit

• hyponym corner, niche, recess, recession

• hyponym bowl, trough

• hyponym pocket, scoop

• hyponym depression, impression, imprint

• hyponym cup

• hyponym indentation, indenture

concave shape

• (suomi) kovera muoto (synonyymi)

concavity

• (englanti) concave (derivationally related)
• (suomi) koveruus (synonyymi)

• (suomi) konkaavius (synonyymi)

incurvation

• (englanti) incurvate (derivationally related)

• (englanti) incurvate (derivationally related)
• (suomi) käyristys (synonyymi)

incurvature

• (suomi) käyristys (synonyymi)