scavenger

nouns

a chemical agent that is added to a chemical mixture to counteract the effects of impurities
scavenger
is derived from
scavenge
is a type of (narrower)
an agent that produces chemical reactions
chemical agent
someone who collects things that have been discarded by others
magpie, pack rat, scavenger
is derived from
scavenge
any animal that feeds on refuse and other decaying organic matter
scavenger
is derived from
scavenge
is a type of (narrower)
a living organism characterized by voluntary movement
animal, animate being, beast, brute, creature, fauna