Note 9 — Chapter I · THE CHARACTER AND FORM OF THE WORLD.
Reading edition
The term Mundus is used by Pliny, sometimes to mean the earth and its immediate appendages, the visible solar system; and at other times the universe; while in some instances it is used in a rather vague manner, without any distinct reference to either one or other of the above designations. I have usually translated it by the term world, as approaching nearest to the sense of the original.