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.
Multiples of SI units of time longer than a second including megaseconds are rarely used because the traditional units of time are still almost always used. One megasecond is approximately 11.6 days. If megaseconds are used, it would be used to specify lengths of events that last for weeks, months, or years. One mean Gregorian month is about 2.63 Ms and one mean Gregorian year is 31.557 Ms (31.536 Ms in common years and 31.6224 Ms in leap years).