pos‧i‧tron /ˈpɒzətrɒn, ˈpɒzɪtrɒn $ ˈpɑːzətrɑːn/
noun [countable] technical[
Date: 1900-2000;
Origin: positive + -tron (as in electron)]
a very small piece of matter that has the same mass as an
electron but has a positive electrical
charge [TahlilGaran] Dictionary of Contemporary English ▲