mesotron

[mez-uh-tron, mes-, mee-zuh-, -suh-] /ˈmɛz əˌtrɒn, ˈmɛs-, ˈmi zə-, -sə-/
noun, Physics.
1.
(no longer in technical use) meson.
Origin
1935-40; meso- + (elec)tron
Related forms
mesotronic, adjective
British Dictionary definitions for mesotron

mesotron

/ˈmɛsəˌtrɒn/
noun
1.
a former name for meson