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nucleus, in physics
(Encyclopedia)nucleus, in physics, the extremely dense central core of an atom. Following the discovery of radioactivity by A. H. Becquerel in 1896, Ernest Rutherford identified two types of radiation given off b...nun, in religion
(Encyclopedia)nun: see monasticism.nut, in botany
(Encyclopedia)nut, in botany, a dry one-seeded fruit which is indehiscent (i.e., does not split open along a definite seam at maturity). Among the true nuts are the acorn, chestnut, and hazelnut. Commonly the word ...naturalism, in art
(Encyclopedia)naturalism, in art, a tendency toward strict adherence to the physical appearance of nature and rejection of ideal forms. Artists as diverse as Velázquez, J. F. Millet, and Monet, have followed natur...naturalism, in literature
(Encyclopedia)naturalism, in literature, an approach that proceeds from an analysis of reality in terms of natural forces, e.g., heredity, environment, physical drives. The chief literary theorist on naturalism was...naturalism, in philosophy
(Encyclopedia)naturalism, in philosophy, a position that attempts to explain all phenomena and account for all values by means of strictly natural (as opposed to supernatural) categories. The particular meaning of ...nautilus, in zoology
(Encyclopedia)nautilus or chambered nautilus, cephalopod mollusk belonging to the sole surviving genus (Nautilus) of a subclass that flourished 200 million years ago, known as the nautiloids. The spirally coiled sh...nymph, in zoology
(Encyclopedia)nymph, in zoology: see insect.snake, in zoology
(Encyclopedia)snake, common name for an elongated, limbless reptile of the order Squamata, which also includes the xlizards. Most snakes live on the ground, but some are burrowers, arboreal, or aquatic; one group i...sol, in chemistry
(Encyclopedia)sol, in chemistry: see colloid.Browse by Subject
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