toponium

词形变化

toponia toponiums 复数 toponiums toponia 复数

释义与例句

n.
  1. 1.

    Any hypothetical meson formed from a top quark and its antiquark; would be very unstable because of the large mass of the top quark

    物理

词源

Etymology tree English top English onium English -on Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English -onium English toponium From top + -onium. From top quark and "-onium" as in positronium.

来源：wiktionary