It's not a dumb question. AN avatar is the little pic that some folks have posted by their names on the message board. Some have single pics some have slide shows of their horses. That pic/image is called an avatar.
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Avatar (icon)
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For other uses, see Avatar (disambiguation).
An avatar (abbreviations include AV, ava, avie, avy, avi, avvie, and avvy) is an Internet user's representation of himself or herself, whether in the form of a three-dimensional model used in computer games,[1] a two-dimensional icon (picture) used on Internet forums and other communities,[2][3] or a text construct found on early systems such as MUDs. The term "avatar" can also refer to the personality connected with the screen name, or handle, of an Internet user.[4]