convex
/ˈkɑn.vɛks/ adjective C1- Curved or bowed outward like the outside of a bowl, circle, or sphere.
- having an epigraph that is a convex set.
- having no internal angles greater than 180 degrees.
- arranged such that for any two points in the set, a straight line between the two points is contained within the set.
From the library
Then with an expression of interest he laid down his cigarette, and carrying the cane to the window, he looked over it again with a convex lens.
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