polyphaseadj.n.

Brit.

/ˈpɒlɪfeɪz/, U.S.

/ˈpɑliˌfeɪz/

Origin: Formed within English, by compounding. Etymons: poly- comb. form, phase n.²

Etymology: < poly- comb. form + phase n.² Compare French polyphasé , adjective (1891, with reference to electric currents). Compare multiphase adj.

A. adj.

1. Consisting of, using, or involving two, three, or more alternating currents that are identical in frequency but differ in phase. Also called multiphase.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > phase > [adjective] > of many phases

multiple-phase1891

polyphase1891

multiphase1892

1891 Electrician 27 376 Three articles on the polyphase alternate current system.

1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) vii. 176 The most important practical distinction (apart from that between direct, alternating and polyphase current motors) is that between synchronous and asynchronous motors.

1947 S. A. Stigant Mod. Electr. Engin. Math. i. 17 The h vector operator is encountered in polyphase a.c. theory, particularly in connection with three-phase circuits.

1994 GEC Ann. Rep. 1993–4 24/1 The defranchised market for electricity supplies above 100kw enabled it to secure a large share of the market with its new programmable polyphase meters.

2. Consisting of or involving a number of different phases of matter.

ΘΚΠ

the world > matter > chemistry > physical chemistry > phases > [adjective] > involving a number of different phases

polyphase1914

1914 Amer. Jrnl. Bot. 1 142 Hofmeister has emphasized the possibility of widely different chemical processes and conditions coexisting in a polyphase colloidal system like the cell.

1940 Jrnl. Royal Aeronaut. Soc. 44 538 Precipitation hardening leads generally to the formation of polyphase systems, and a solution hardened metal shows distinct advantages.

1964 L. H. Van Vlack Elements Materials Sci. (ed. 2) vi. 134 Multiphase, or polyphase, alloys contain additional phases because the solid solubility limit is exceeded. The majority of our steels, as well as many other metals, are multiphase alloys.

1993 Appl. Superconductivity 1 81 Ag-clad tapes of Bi_1.8Pb_0.4Sr₂Ca₂Cu₃O_x..were fabricated from polyphase powder which reactively sinter in situ.

3. Chiefly Geology. Consisting of or occurring in a number of separate stages.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > tectonization or diastrophism > [adjective] > orogenesis > type

polyphase1936

monocyclic1952

the mind > mental capacity > psychology > developmental psychology > [adjective] > occurring in stages

polyphase1958

1936 Proc. Prehistoric Soc. 2 155 In 1932..I attempted an analysis of the evidence for a polyphase Ice Age.

1958 R. S. Woodworth Dynamics of Behavior ii. 39 The child's developing purposiveness spreads in the opposite direction. It is visible first in the little two-phase and polyphase acts.

1973 Philos. Trans. (Royal Soc.) A. 273 482 Any classification of the type of polyphase metamorphism..must consider the complex interplay of prograde and retrograde metamorphic sequences.

1990 Science 17 Sept. 1888/1 The late-glacial is a polyphase interval in which temperature and moisture availability oscillated abruptly.

B. n.

An electrical circuit or apparatus using a polyphase current. rare.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > phase > [noun] > system of currents

polyphase1901

1901 Daily Chron. 7 Nov. 7/3 The witness..came to discover that the polyphase was capable of being stopped within a remarkably short space.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polyphase
释义	polyphaseadj.n. Brit. /ˈpɒlɪfeɪz/, U.S. /ˈpɑliˌfeɪz/ Origin: Formed within English, by compounding. Etymons: poly- comb. form, phase n.² Etymology: < poly- comb. form + phase n.² Compare French polyphasé , adjective (1891, with reference to electric currents). Compare multiphase adj. A. adj. 1. Consisting of, using, or involving two, three, or more alternating currents that are identical in frequency but differ in phase. Also called multiphase. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > phase > [adjective] > of many phases multiple-phase1891 polyphase1891 multiphase1892 1891 Electrician 27 376 Three articles on the polyphase alternate current system. 1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) vii. 176 The most important practical distinction (apart from that between direct, alternating and polyphase current motors) is that between synchronous and asynchronous motors. 1947 S. A. Stigant Mod. Electr. Engin. Math. i. 17 The h vector operator is encountered in polyphase a.c. theory, particularly in connection with three-phase circuits. 1994 GEC Ann. Rep. 1993–4 24/1 The defranchised market for electricity supplies above 100kw enabled it to secure a large share of the market with its new programmable polyphase meters. 2. Consisting of or involving a number of different phases of matter. ΘΚΠ the world > matter > chemistry > physical chemistry > phases > [adjective] > involving a number of different phases polyphase1914 1914 Amer. Jrnl. Bot. 1 142 Hofmeister has emphasized the possibility of widely different chemical processes and conditions coexisting in a polyphase colloidal system like the cell. 1940 Jrnl. Royal Aeronaut. Soc. 44 538 Precipitation hardening leads generally to the formation of polyphase systems, and a solution hardened metal shows distinct advantages. 1964 L. H. Van Vlack Elements Materials Sci. (ed. 2) vi. 134 Multiphase, or polyphase, alloys contain additional phases because the solid solubility limit is exceeded. The majority of our steels, as well as many other metals, are multiphase alloys. 1993 Appl. Superconductivity 1 81 Ag-clad tapes of Bi_1.8Pb_0.4Sr₂Ca₂Cu₃O_x..were fabricated from polyphase powder which reactively sinter in situ. 3. Chiefly Geology. Consisting of or occurring in a number of separate stages. ΘΚΠ the world > the earth > structure of the earth > formation of features > tectonization or diastrophism > [adjective] > orogenesis > type polyphase1936 monocyclic1952 the mind > mental capacity > psychology > developmental psychology > [adjective] > occurring in stages polyphase1958 1936 Proc. Prehistoric Soc. 2 155 In 1932..I attempted an analysis of the evidence for a polyphase Ice Age. 1958 R. S. Woodworth Dynamics of Behavior ii. 39 The child's developing purposiveness spreads in the opposite direction. It is visible first in the little two-phase and polyphase acts. 1973 Philos. Trans. (Royal Soc.) A. 273 482 Any classification of the type of polyphase metamorphism..must consider the complex interplay of prograde and retrograde metamorphic sequences. 1990 Science 17 Sept. 1888/1 The late-glacial is a polyphase interval in which temperature and moisture availability oscillated abruptly. B. n. An electrical circuit or apparatus using a polyphase current. rare. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > phase > [noun] > system of currents polyphase1901 1901 Daily Chron. 7 Nov. 7/3 The witness..came to discover that the polyphase was capable of being stopped within a remarkably short space. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.n.1891
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