cyclic ring
21ring compound — noun : a cyclic compound containing one or more rings in the molecule * * * Chem. a compound whose structural formula contains a closed chain or ring of atoms; a cyclic compound. Cf. cyclic (def. 3). [1930 35] * * * ring compound, a compound of… …
22Cyclic homology — In homological algebra, cyclic homology and cyclic cohomology are (co)homology theories for associative algebras introduced by Alain Connes around 1980, which play an important role in his noncommutative geometry. They were independently… …
23Ring-opening polymerization — In polymer chemistry, ring opening polymerization is a form of addition polymerization, in which the terminal end of a polymer acts as a reactive center, where further cyclic monomers join to form a larger polymer chain through ionic propagation …
24ring — ring1 ringless, adj. ringlike, adj. /ring/, n., v., ringed, ringing. n. 1. a typically circular band of metal or other durable material, esp. one of gold or other precious metal, often set with gems, for wearing on the finger as an ornament, a… …
25ring — I. /rɪŋ / (say ring) noun 1. a circular band of metal or other material, especially one of gold or other precious metal, often set with gems, for wearing on the finger as an ornament, a token of betrothal or marriage, etc. 2. anything having the… …
26Cyclic polytope — In mathematics, a cyclic polytope, denoted C(n,d), is a convex polytope formed as a convex hull of n distinct points on a rational normal curve in Rd, where n is greater than d. These polytopes were studied by Constantin Carathéodory, David Gale …
27ring — I [[t]rɪŋ[/t]] n. 1) jew a typically circular band of durable material, as gold, worn on the finger as an ornament, a token of betrothal or marriage, etc 2) anything having the form of such a band: a smoke ring[/ex] 3) a circular line or mark:… …
28ring — I. noun Etymology: Middle English, from Old English hring; akin to Old High German hring ring, Old Church Slavic krǫgŭ circle Date: before 12th century 1. a circular band for holding, connecting, hanging, pulling, packing, or sealing < a key ring …
29Ring expansion reaction — A ring expansion reaction is a type of organic reaction in which usually a hydrocarbon ring is expanded. Examples of ring expansions are: * Beckmann rearrangement * Dowd Beckwith ring expansion reaction. Ring contraction reaction A ring… …
30ring compound — Chem. a compound whose structural formula contains a closed chain or ring of atoms; a cyclic compound. Cf. cyclic (def. 3). [1930 35] * * * …
