Part of the IT standards and organizations glossary: The Stefan-Boltzmann constant, symbolized by the lowercase Greek letter sigma (), is a physical constant involving black body radiation.A black body, also called an ideal radiator, is an object that radiates or absorbs energy with perfect efficiency at all electromagnetic wavelength s.art of the IT standards and organizations glossary: The Stefan-Boltzmann constant, symbolized by the lowercase Greek letter sigma (), is a physical constant involving black body radiation.
Definition of memoir for English Language Learners. memoirs : a written account in which someone (such as a famous performer or politician) describes past experiences.
Please try again later. A memoir is a book of memories that is a work of literary non-fiction. It differs from a diary because in a memoir the writer is the main character, and it is a reflection over the years with the collective experiences having a general theme.In a diary, it goes day by day and only reflects that day's themes.Maybe you should write one.t differs from a diary because in a memoir the writer is the main character, and it is a reflection over the years with the collective experiences having a general theme. In a diary, it goes day by day and only reflects that day's themes. Maybe you should write one.