> It may be useful to look up the word "diastaseis" - almost =
> "dimensions" - in
> vol. 3, p. 522, of the Dover edition of the "Elements," as well as the
>
> references to volumes 1 and 3 given under this item.
>
> (Abe Shenitzer)
Indeed, 'diastHma' can mean a 'dimension' in something like the
modern sense, but, I should point out, its basic meaning is 'distance'
or 'interval' (also in musical contexts, by the way) and its use as
'dimension' is rare.
Michael Fried