Definition of Planckian in US English:

Planckian

adjective

Physics
  • Of, relating to, or investigated in the work of Planck; especially predicted by or behaving in accordance with Planck's law of black body radiation.

Origin

1920s; earliest use found in Journal of the Optical Society of America. From the name of Max Karl Ernst Ludwig Planck + -ian.

Pronunciation

Planckian

/ˈplaŋkɪən/