This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A curving or the state of being curved.

n. Specifically, in entomology: The state of being curved inward.

n. A part or margin curved inward, or toward the median line.

n. a shape that curves or bends inward

"The incurvature of the legs proves that this young man must have walked with bent knees like the old men of our own day."

solid   

cup    bowl    corner    recession    impression    trough    recess    dome    indenture    depression