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optic disk
optic nerve
optic vesicle
optical
optical activity
optical art
optical brightener
optical character reader
optical character recognition
optical computer
optical disk
optical double star
optical fiber
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optical illusion
optical isomerism
optical mouse
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opt-in e-mail

opt-in e-mail


noun 
Definition:
 
requested information as e-mail: e-mail from advertisers of a kind that users have expressed an interest in. A Web site provides a form on which users identify areas of interest, and the form is sold to related advertisers who then e-mail the participants.

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