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.
1 nanoseconds = 1 nanoseconds. And that is the decimal form of a nanoseconds in nanoseconds. It can also be written as 1000 picoseconds or 0.000000000000001 megaseconds but such representations depend on what unit is being used. None has been specified in the question.