symmetrical compound

См. также в других словарях:

• symmetrical — [si me′tri kəl] adj. [ SYMMETR(Y) + ICAL] having or showing symmetry; specif., a) Bot. that can be divided into similar halves by a plane passing through the center; also, having the same number of parts in each whorl of leaves: said of a flower… …   English World dictionary

• Compound of three octahedra — The compound of three octahedra In mathematics, the compound of three octahedra or octahedron 3 compound is a polyhedral compound formed from three regular octahedra, all sharing a common center but rotated with respect to each other. Although… …   Wikipedia

• compound — 1. In chemistry, a substance formed by the covalent or electrostatic union of two or more elements, generally differing entirely in physical characteristics from any of its components. 2. In pharmacy, denoting a preparation containing several… …   Medical dictionary

• symmetrical lens — noun : a simple or compound lens whose optical properties are unaltered when the axis is rotated through 180 degrees …   Useful english dictionary

• chemical compound — Introduction  any substance composed of identical molecules consisting of atoms (atom) of two or more chemical elements (chemical element).       All the matter in the universe is composed of the atoms of more than 100 different chemical elements …   Universalium

• coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction  any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… …   Universalium

• azo compound — ▪ chemical compound       any organic chemical compound in which the azo group (−N=N−) is part of the molecular structure. The atomic groups attached to the nitrogen atoms may be of any organic class, but the commercially important azo compounds …   Universalium

• pentanone — ˈpentəˌnōn noun ( s) Etymology: pentane + one : either of two isomeric flammable liquid ketones derived from normal pentane: a. : the unsymmetrical compound CH3CH2CH2COCH3 called also methyl propyl ketone, 2 pentanone b. : th …   Useful english dictionary

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

• Glossary of botanical terms — Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and… …   Wikipedia