leptonicadj.

Brit.

/lɛpˈtɒnɪk/, U.S.

/lɛpˈtɑnɪk/

Origin: Formed within English, by derivation. Etymons: lepton n.², -ic suffix.

Etymology: < lepton n.² + -ic suffix.

1. Chemistry and Mineralogy. Relating to or involving the concept of ‘leptons’ (lepton n.² 1). Now disused.

ΚΠ

1921 Chem. Abstr. 15 983 In a leptonic sense amorphous matter is no less regular than crystalline.

1925 Mineral. Mag. 20 408 It is quite reasonable to suppose that every vectorial property possessed by a crystal is dependent upon its leptonic structure.

1937 Bull. Geol. Soc. Amer. 48 669 Tomkeieff has described..a method of determining the ‘leptonic structure’ of aragonite by the etch method.

2. Particle Physics. Of or relating to a lepton (lepton n.² 2) or leptons; involving leptons.

ΘΚΠ

the world > matter > chemistry > atomic chemistry > [adjective] > subatomic

subatomic1874

infra-atomic1923

leptonic1957

1957 J. Schwinger in Ann. Physics. 2 422 Particles labelled by leptonic charge and electrical charge permit a complete identification with the known leptons.

1983 Hist. Stud. Physical Sci. 13 212 In the leptonic decays of strange particles the change in strangeness of the hadrons..must equal their change in charge.

1991 C. A. Ronan Nat. Hist. Universe 35 (caption) The leptonic era began after about one second, when the universe had cooled so much that leptons..no longer interacted intensely with hadrons.

2009 B. R. Martin Nucl. & Particle Physics (ed. 2) 181 CP invariance..is believed to be exact for purely leptonic processes.

Compounds

leptonic number n. Particle Physics = lepton number n. at lepton n.² Compounds.

ΚΠ

1958 Proc. 2nd U.N. Internat. Conf. Peaceful Uses Atomic Energy XXX. 53 If a leptonic number is assigned to each particle then the sum of leptonic numbers must be conserved in all reactions.

2008 C.-S. Lam Zen in Mod. Cosmol. xi. 77 In the beta decay of a neutron, it starts out with no leptons, and hence a zero leptonic number, and it ends up with an electron and an anti-neutrino.

This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).

单词	leptonic
释义	leptonicadj. Brit. /lɛpˈtɒnɪk/, U.S. /lɛpˈtɑnɪk/ Origin: Formed within English, by derivation. Etymons: lepton n.², -ic suffix. Etymology: < lepton n.² + -ic suffix. 1. Chemistry and Mineralogy. Relating to or involving the concept of ‘leptons’ (lepton n.² 1). Now disused. ΚΠ 1921 Chem. Abstr. 15 983 In a leptonic sense amorphous matter is no less regular than crystalline. 1925 Mineral. Mag. 20 408 It is quite reasonable to suppose that every vectorial property possessed by a crystal is dependent upon its leptonic structure. 1937 Bull. Geol. Soc. Amer. 48 669 Tomkeieff has described..a method of determining the ‘leptonic structure’ of aragonite by the etch method. 2. Particle Physics. Of or relating to a lepton (lepton n.² 2) or leptons; involving leptons. ΘΚΠ the world > matter > chemistry > atomic chemistry > [adjective] > subatomic subatomic1874 infra-atomic1923 leptonic1957 1957 J. Schwinger in Ann. Physics. 2 422 Particles labelled by leptonic charge and electrical charge permit a complete identification with the known leptons. 1983 Hist. Stud. Physical Sci. 13 212 In the leptonic decays of strange particles the change in strangeness of the hadrons..must equal their change in charge. 1991 C. A. Ronan Nat. Hist. Universe 35 (caption) The leptonic era began after about one second, when the universe had cooled so much that leptons..no longer interacted intensely with hadrons. 2009 B. R. Martin Nucl. & Particle Physics (ed. 2) 181 CP invariance..is believed to be exact for purely leptonic processes. Compounds leptonic number n. Particle Physics = lepton number n. at lepton n.² Compounds. ΚΠ 1958 Proc. 2nd U.N. Internat. Conf. Peaceful Uses Atomic Energy XXX. 53 If a leptonic number is assigned to each particle then the sum of leptonic numbers must be conserved in all reactions. 2008 C.-S. Lam Zen in Mod. Cosmol. xi. 77 In the beta decay of a neutron, it starts out with no leptons, and hence a zero leptonic number, and it ends up with an electron and an anti-neutrino. This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022). < adj.1921
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