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opsonic
opsonic index
opsonify
opsonin
opsonize
-opsy
opt
opt.
opt-in e-mail
opt out
opt-out
optative
optic
optic axis
optic chiasma
optic cup
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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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