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.
You do not use 'memoirs' to refer to things that you remember about the past. The word you use is memories. My memories of a London childhood are happy ones. One of my earliest memories is of a total eclipse of the sun. memoirs. plural noun autobiography, diary, life story, life, experiences, memories, journals, recollections, reminiscences If you've read my memoirs, you'll know about it.