中石器時代

ちゅうせっきじだい

noun

•

Mesolithic, Middle Stone Age

中	in, inside, middle, mean, center
石	stone
器	utensil, vessel, receptacle, implement, instrument, ability, container, tool, set
時	time, hour
代	substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee