e/Kaonium

Information
has gloss	eng: Kaonium is an exotic atom consisting of a bound state of a positively-charged and a negatively-charged kaon. Kaonium has not been observed experimentally and is expected to have a short lifetime on the order of 10-18 seconds .
lexicalization	eng: Kaonium
instance of	(noun) an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0 mesotron, meson