Englishfor English speakers
c
Noun
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C is the third letter of the alphabet.
"b" comes before "c"
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In some schools, an C is the passing grade.
Albert only just passed the exam; he got a C.
region
Noun
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A region is an area of land or of the body.
The fishing problems have been happening only in the Atlantic coast region.
The southern regions of Japan are warm and tropical.
If we do an operation in this region of the brain, you may lose your ability to speak.
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A region is any connected part of a space or surface. This definition is useful in geometry.
In Euclidean space, a convex set is a region which has a geometric definition.