nucleoniumn.
/njuːklɪˈəʊnɪəm/, U.S. /ˌn(j)ukliˈoʊniəm/ Particle Physics. Now rare.
A particle consisting of a nucleon and the corresponding antinucleon bound to each other. Usually without article, and attributive.
ΘΚΠ
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nucleonium1956
1956 Physical Rev. 103 258/1 We consider annihilation of nucleonium, i.e., a nucleon–antinucleon pair.
1964 Proc. Royal Soc. A. 278 297 We also should list the analogue to positronium: systems of nucleons and antinucleons which we may call ‘nucleonium’.
1974 McGraw-Hill Yearbk. Sci. & Technol. 102/1 The simplest kind of nucleonium atom is the protonium atom, which consists of a proton and an antiproton.
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1956- out beyond all recognition
- out beyond recognition
- out but repair
- out for the count
- out foreign
- out forth of door
- out forth of doors
- out from bias
- out from one's bias
- out from the goodness of one's heart
- out front
- out in collar
- out in the cold
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- out in the sticks
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- out loud
- out measure
- out of
- out of a clear blue sky
- out of a clear sky
- out of a job
- out of a person's books
- out of a person's expectation
- out of a person's expectations