chemical science,
chemistry the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
scavenge -
feed on carrion or refuse; "hyenas scavenge"
feed,
give introduce continuously; "feed carrots into a food processor"
scavenge -
clean refuse from; "Scavenge a street"
make clean,
clean remove unwanted substances from, such as feathers or pits; "Clean the turkey"
scavenge -
collect discarded or refused material; "She scavenged the garbage cans for food"