The helix, or hilus
Concave
One of the differences between a bay and a gulf is that a bay has an inward land curve. The Hudson Bay has an inward curve.
An inward curve is called concave, while an outward curve is called convex
zig
Yes.
A lenses that curve outward is convex.A lenses that curve inward is concave.
Could mean you have Rickets
Both sides of a lens curve inward.
The curve moves inward
The curve moves inward
Convex lenses are curved inward. Concave lenses curve outward.