Diphtheria. An acute infectious disease of humans caused by Corynebacterium diphtheriae. Classically, the disease is characterized by low-grade fever, sore throat, and a pseudomembrane covering the tonsils and pharynx.
Statistician / Economist formerly employed in various Government Departments in the UK, freelance mathematics and statistics tutor since retiring in 2008, Fellow of the Royal Statistical Society. 1 second = 100 centiseconds. To help you remember, 1 meter = 100 centimeters and centi- anything is the same.
Fastener manufacturers identify the size of a metric fastener differently than an SAE fastener. As an example, a metric fastener size is: M12 x 2. This means that the major diameter of the threads is 12 mm and that the thread pitch is 2 mm (there are 2 mm between threads).