“It refers to the diameter of the metal ring on which the bead of the tire rests.”

“The barrel channel within the stock was shimmed to support the smaller diameter smokeless barrel.”

“A close-fitting metal shoe with a central opening of 12.7 mm diameter flattened the section against the ceramic plate of the transducer.”

“The inner diameters of the seals were adapted to the diameters of the basal parts of root systems and adjusted by screws.”

“Picard devised a micrometer to measure the diameters of celestial objects such as the Sun, Moon and planets.”

“An aerogel is a porous network of silica strands with diameters of a few nanometres.”