a particle accelerator

could it be that

(idiomatic) to listen to

a depressor labii inferioris

dissolved / liquefied / molten

location, position

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

number one (used in legal documents)

a market, a marketplace / a place where a lot of people gather / (less commonly) a town, a city

(archaic) the first month of the lunar calendar / one month / a full moon