’Nor, having only length, breadth, and thickness, can a cube have a real existence.’
’Clearly,’ the Time Traveller proceeded, ’any real body must have extension in four directions: it must have Length, Breadth, Thickness, and—Duration.
That Space, as our mathematicians have it, is spoken of as having three dimensions, which one may call Length, Breadth, and Thickness, and is always definable by reference to three planes, each at right angles to the others.
There are no more uses of "breadth" in the book.
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The introductory courses are meant to add to breadth rather than depth of understanding.
a teacher must have a breadth of knowledge of the subject