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sand

(Encyclopedia)sand, rock material occurring in the form of loose, rounded or angular grains, varying in size from .06 mm to 2 mm in diameter, the particles being smaller than those of gravel and larger than those o...

sin, in religion

(Encyclopedia)sin, in religion, unethical act. The term implies disobedience to a personal God, as in Judaism, Christianity, and Islam, and is not used so often in systems such as Buddhism where there is no persona...

Stoicism

(Encyclopedia)Stoicism stōˈĭsĭzəm [key], school of philosophy founded by Zeno of Citium (in Cyprus) c.300 b.c. The first Stoics were so called because they met in the Stoa Poecile [Gr.,=painted porch], at Athe...

molecule

(Encyclopedia)molecule mŏlˈəkyo͞ol [key] [New Lat.,=little mass], smallest particle of a compound that has all the chemical properties of that compound. A single atom is usually not referred to as a molecule, a...

brain

(Encyclopedia)CE5 Brain brain, the supervisory center of the nervous system in all vertebrates. It also serves as the site of emotions, memory, self-awareness, and thought. Brain research, now often referred ...

Zoroastrianism

(Encyclopedia)Zoroastrianism zôˌrōăsˈtrēənĭzəm [key], religion founded by Zoroaster, but with many later accretions. The religion's priests, successors to the pre-Zoroastrian Magi, acquired great power b...

philosophy

(Encyclopedia)philosophy [Gr.,=love of wisdom], study of the ultimate reality, causes, and principles underlying being and thinking. It has many aspects and different manifestations according to the problems involv...

diffusion

(Encyclopedia)diffusion, in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life process...

injunction

(Encyclopedia)injunction, in law, order of a court directing a party to perform a certain act or to refrain from an act or acts. The injunction, which developed as the main remedy in equity, is used especially wher...

Gallicanism

(Encyclopedia)Gallicanism gălˈĭkənĭzˌəm [key], in French Roman Catholicism, tradition of resistance to papal authority. It was in opposition to ultramontanism, the view that accorded the papacy complete auth...