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Robert Eno wrote:

>I was refering to the curved surface of the sphere. For a circle, it is 
called an "arc" but I have yet to find a proper name for a portion of the 
surface of a sphere. I have heard different terms such as "lune", "lens" 
"cap" etc. but I am certain that there has to be a proper mathematical term 
for this. Or is there?
>
>
All these terms refer to solid bodies. Lune usually refers to a
2-dimensional shape that results from intersecting two circles. I guess,
by analogy, one could speak of a 3-dimensional (i.e. solid) lune.

The beauty of math is that you can use words that aren't in the Oxford
English Dictionary. If you need a word badly, coin it. If it turns out
to be important you will get famous for it. Even better: Don't coin a
word. Use a long winded descriptive term each time you need it. Somebody
will get frustrated after a while and call it "Enoid".

Herbert

   

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