twin crystals

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• Twin — Twin, n. 1. One of two produced at a birth, especially by an animal that ordinarily brings forth but one at a birth; used chiefly in the plural, and applied to the young of beasts as well as to human young. [1913 Webster] 2. pl. (Astron.) A sign… …   The Collaborative International Dictionary of English

• twin — [twin] adj. [ME < OE twinn & ON tvinnr, double, both < base of TWO] 1. a) consisting of or being two separate but similar or closely related things; forming a pair; double; paired [twin beds] b) being one of a pair of such things; being a… …   English World dictionary

• twin|ning — «TWIHN ihng», noun. 1. the bearing of twins. 2. Figurative. close union or combination; coupling. 3. the union of two or more crystals so as to form a twin …   Useful english dictionary

• twin — I. noun Etymology: Middle English, from twin twofold Date: 14th century 1. a. either of two offspring produced at a birth b. plural, capitalized Gemini 2. one of two persons or things closely related to or resembling each other 3. a compound… …   New Collegiate Dictionary

• twin — twin1 /twin/, n., adj., v., twinned, twinning. n. 1. either of two children or animals brought forth at a birth. 2. either of two persons or things closely related to or closely resembling each other. 3. See twin bed. 4. Also called …   Universalium

• twin — /twɪn / (say twin) noun 1. (plural) two children or animals brought forth at a birth. 2. one of two such children or animals. 3. (plural) two persons or things closely related or connected or closely resembling each other. 4. either of two such… …  

• twin — [[t]twɪn[/t]] n. adj. v. twinned, twin•ning 1) dvl either of two children or animals brought forth at a birth 2) either of two persons or things closely related to or closely resembling each other 3) cry a compound crystal consisting of two or… …   From formal English to slang

• twin crystal — noun either of two separate crystals that share crystal lattice points in a symmetrical manner and intergrow See Also: crystal twinning …   Wiktionary

• twinning — /twin ing/, n. 1. the bearing of two children at one birth. 2. the coupling of two persons or things; union. 3. Crystall. the union of crystals to form a twin. [1565 75; TWIN1 + ING1] * * * ▪ crystallography       in crystallography, regular… …   Universalium

• Crystallographic database — A crystallographic database is a database specifically designed to store information about crystals and crystal structures. Crystals are solids having, in all three dimensions of space, a regularly repeating arrangement of atoms, ions, or… …   Wikipedia

• Druse (botany) — Druse in onion scales (100x magnification) Druse are groups of crystals of calcium oxalate[1], silicates or carbonates present in plants. Calcium oxalate (Ca(COO)2, CaOx) crystals are found in algae, angiosperms and gymnosperms in a total of more …   Wikipedia