Edit Multiple Posts/Pages

I’m sure this has been asked before, but my searching here and at the Codex didn’t get me what I wanted. Is it possible to edit multiple posts/pages at once? I’m referring to a find/replace type of feature, rather than having multiple posts on one page, and going down, editing them one at a time. If I have the some text in several posts and/or pages, for instance, is there a way to have WP find all instances and change them to what I want? Or, is there a plugin that will do this? Thanks!