What does "concave" mean?

Question

apologiabiology · Answer

we know that a cave is a big indent in the rock that curves inward 
 con, in latin, means something like 'with' or together' so concave means with cave or curving with the cave or curving inward

apologiabiology · Answer

Concave refers to shapes that curve inward, resembling the inside of a bowl or cave. This term contrasts with convex, which describes outward bulging shapes. Concave is a key term in mathematics and optics, particularly related to mirrors that focus light. 
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What does "concave" mean?

Answer (2)

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