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ethyl carbamate
ethyl ethanoate
ethyl mercaptan
ethylamine
ethylate
ethylene
ethylene glycol
ethylene oxide
ethyne
ethynyl
-etic
etic
etiolated
etiology
etioplast
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ethology
e·thol·o·gy [ ee thólləjee, i thólləjee ]


noun 
Definition:
 
1. study of animal behavioral patterns: the study of the behavior of animals in their natural habitat, usually proposing evolutionary explanations
2. psychology 
Same as  human ethology
[Mid-17th century. < Latin ethologia< Greek ēthos (see ethos)]

eth·o·log·i·cal [ thə lójjik'l, èthə lójjik'l ] adjective
e·thol·o·gist noun
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