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.
A nanosecond (ns or nsec) is one billionth (10 -9) of a second and is a common measurement of read or write access time to random access memory (RAM). A picosecond is one trillionth (10 -12) of a second, or one millionth of a microsecond.A femtosecond is one millionth of a nanosecond or 10 -15 of a second and is a measurement sometimes used in laser technology. An attosecond is one quintillionth (10 -18) of a second and is a term used in photon research. microsecond (us or Greek letter mu plus s) is one millionth (10 -6) of a second.