SCAVENGER

n. one who cleans; animal that feeds on trash or decaying flesh; street cleaner; one who searches through garbage for usable materials

Scavengers are animals that consume already dead animals (carrion). Scavengers play an important role in the ecosystem by contributing to the decomposition of dead animal remains. Decomposers complete this process, by consuming the remains left by scavengers. Well known scavengers include vultures, burying beetles, blowflies, yellowjackets, and raccoons. Many large carnivores that hunt regularly--such as hyenas and lions--will scavenge if given the chance. Animals which consume feces, such as dung beetles, are also referred to as scavengers. Animals which primarily consume dead plants (litter) are referred to as detritivores.
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Noun
1. a chemical agent that is added to a chemical mixture to counteract the effects of impurities
(hypernym) chemical agent
(derivation) scavenge, clean
2. someone who collects things that have been discarded by others
(synonym) magpie, pack rat
(hypernym) hoarder
(derivation) salvage, scavenge
3. any animal that feeds on refuse and other decaying organic matter
(hypernym) animal, animate being, beast, brute, creature, fauna
(hyponym) bottom feeder
(derivation) scavenge

(v.)
A person whose employment is to clean the streets of a city, by scraping or sweeping, and carrying off the filth. The name is also applied to any animal which devours refuse, carrion, or anything injurious to health.
  

n.
خاکروب, جاروب کش, سڑکوں کا جھاڑنے والا, (بہنگي, مہتر, حلال خور)