Definition of Gamblian in US English:

Gamblian

noun

Geology
rare
  • An East African pluvial period of the Pleistocene, preceding the Makalian.

adjective

Geology
rare
  • Designating this period; of or relating to this period.

Origin

1920s; earliest use found in Louis Leakey (1903–1972), archaeologist and palaeoanthropologist. From Gamble + -ian.

Pronunciation

Gamblian

/ˈɡamblɪən/