to pile up; to heap up; a mass; pile; heap; stack; large amount

reactor

garbage heap

bonfire; to open fire

nuclear reactor

mound

(of people) to flock together; to congregate

to stockpile

wet piling, aka wet pile fermentation (a stage in the production of certain types of tea, notably 熟普洱茶[shou2 Pu3 er3 cha2], ripe Pu'er tea)

papers; stack of paper

archaeological site of Sanxingdui outside Chengdu (Sichuan), exhibiting remarkable bronze artifacts from the 11-12th centuries BC

atomic pile (original form of nuclear reactor)

a pile of old books

pile of rubble; debris

Mawangdui in Changsha, Hunan, a recent Han dynasty archaeological site

nuclear test reactor

to dig into piles of outdated writings (idiom); to study old books and papers

zero power reactor

power reactor

atomic reactor

breeder reactor

thermal reactor

production reactor

light water reactor (LWR)

heavy water reactor (HWR)

gas-cooled reactor