The diameter of the inside of a tube, pipe or other object. Often abbreviated "ID".
Internal-diameter Sentence Examples
In the United Kingdom the metric standard of capacity is the litre, represented (Order in Council, 19th May 1890) by the capacity of a hollow cylindrical brass measure whose internal diameter is equal to one-half its height, and which at 0° C., when filled to the brim, contains one kg.
A secondary standard measure for dry goods is the bushel of 1824, containing 8 imperial gallons, represented by a hollow bronze cylinder having a plane base, its internal diameter bring double its depth.
would suffice, but if intended to combine display with storage, the internal diameter should be about 13 ft.
But If The Fluid Be Mercury, The Flat End Of The Tube Remains Unwetted, And The Formation Of The Drop Depends Upon The Internal Diameter Only.