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ecospecies
ecosphere
écossaise
ecosystem
ecoterrorism
ecotone
ecotourism
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ecotoxicology
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ecotoxicology
ec·o·tox·i·col·o·gy [ èkō tòksi kólləjee, kō tòksi kólləjee ]


noun 
Definition:
 
study of substances harmful to environment: the study of how organisms are affected by chemicals released into the environment by human activities

ec·o·tox·i·co·log·i·cal [ èkō toksikə lójjik'l, kō toksikə lójjik'l ] adjective
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