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单词 multiple twin
释义

multiple twinn.

Brit. /ˌmʌltᵻpl ˈtwɪn/, U.S. /ˌməltəp(ə)l ˈtwɪn/
Origin: Formed within English, by compounding. Etymons: multiple adj., twin n.
Etymology: < multiple adj. + twin n. In sense 1 apparently earliest in multiple twin cable (see quot. 1922 at sense 1). With sense 2 compare earlier penetration twin n. at penetration n. Compounds.
1. Telephony. A cable with a number of cores each of which consists of four wires arranged as two twisted pairs twisted together. Usually attributive.
ΘΚΠ
society > communication > telecommunication > telegraphy or telephony > [noun] > line
wire1813
line1847
wire line1848
loop1863
landline1865
saddle wire1876
telephone line1877
concentric cable1888
Pupin cable1904
multiple twin1922
quad1922
twisted pair1923
star quad1927
music line1929
coaxial cable1934
coax1945
1922 Encycl. Brit. XXXII. 709/1 In..the ‘multiple twin cable’ the centre of yarn is dispensed with, and the cable consists of a number of 4-wire cores.
1959 J. W. Freebody Telegr. vi. 173/2 With the multiple-twin type [of cable] the paper insulated conductors are first twisted into pairs and two such pairs are then twisted together to form the two pair core or quad.
2. Crystallography. A twinned crystal composed of alternating lamellae whose relative orientations are all governed by the same twin law.
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the world > matter > chemistry > crystallography (general) > crystal (general) > crystal types > [noun] > composite crystals > twin > types of
penetration twin1868
juxtaposition twin1883
multiple twin1932
1888 N. Amer. Rev. July 53 They were perfect spheres, the result of a multiple twinning of the cubic form of the diamond.]
1932 Amer. Mineralogist 17 360 The diamond multiple twin..is from South Africa.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) V. 208/1 The width of the lamellae in multiple twins of plagioclases is usually about 1 mm and smaller.
1994 Philos. Mag. A. 69 1125 In the initial stage of the growth process of ZnO particles, it is assumed that octahedral multiple twins (octa-twins) are nucleated as embryos.
This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022).
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n.1922
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