exterminator

[ik-stur-muh-ney-ter]
noun
1.
a person or thing that exterminates.
2.
a person or business establishment specializing in the elimination of vermin, insects, etc., from a building, apartment, etc., especially by the controlled application of toxic chemicals.

Origin:
1605–15; < Late Latin exterminātor. See extermine, -ator

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World English Dictionary
exterminate (ɪkˈstɜːmɪˌneɪt)
 
vb
(tr) to destroy (living things, esp pests or vermin) completely; annihilate; eliminate
 
[C16: from Latin extermināre to drive away, from terminus boundary]
 
ex'terminable
 
adj
 
extermi'nation
 
n
 
ex'terminative
 
adj
 
ex'terminatory
 
adj
 
ex'terminator
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Despite four visits by an exterminator, the bedbugs refused eviction.
After the exterminator leaves, check for new rat droppings.
If new droppings appear and the bait is untouched, you may need to contact the
  exterminator again.
Consult a professional exterminator with experience in bed bug control.
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