Word: toponium
Part of speech: Noun
Syllables: to
po
ni
um
Definition: Any hypothetical meson formed from a top quark and its antiquark; would be very unstable because of the large mass of the top quark
Morphemes:
Affix: top
Language: en
PoS: Noun
Meaning: A top quark; hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3
Affix: -onium
Language: en
PoS: Suffix
Meaning: Designating an onium particle.