一いち増ぞう一いち減げん

noun

16.8-million-year period of human lifespan increase and decrease

Buddhist cosmological term. Describes a cycle where the human lifespan gradually increases from 10 years to 84,000 years (by one year per century) and then decreases back to 10 years. Rare outside Buddhist contexts.

• 仏ぶっ教きょうの経きょう典てんには、一いち増ぞう一いち減げんという長ちょう大だいな時じ間かんの単たん位いが説とかれている。

  Buddhist scriptures describe a vast unit of time called 一増一減.