"Slight curvature" means a gentle or small bend or curve in something, not very noticeable or severe.
Sentences with «slight curvature»
A number of factors can affect the quality of contact, including rigidity of the surfaces, slight curvatures, and gas molecules that get in between the two solid layers, Li says. (sciencedaily.com)
I have a slight curvature to my spine, because I have scoliosis. (mindbodygreen.com)
There's still some slight curvature for the roof, which keeps the wagon from looking too boxy. (motor1.com)