Definition of bottomness in English:

bottomness

noun

Particle Physics
  • The characteristic flavour of bottom quarks and bottom antiquarks that distinguishes them from other particles. Also: a quantum number expressing the value of this flavour for a quark or a particle composed of quarks.

Origin

1970s; earliest use found in Science. From bottom + -ness.

Pronunciation

bottomness

/ˈbɒtəmnəs/