google-chromeservices
I'm having a hard time removing the "Lookup in Dictionary" context menu element in Chrome for Mac (see screenshot).
I tried deactivating the Dictionary Service shortcut in Preferences / Keyboard, and I also tweaked Dictionary.app's Info.plist to remove the service. I even removed the entire Dictionary app, but the context menu item still shows. Might it be hard coded into Chrome?
My own experience (on 10.9) is that the service uses the default search engine selected for the default browser, so right now my own "Search with…" says "Search DuckDuckGo for…" and will open in Firefox.
This doesn't answer your other questions, but it may mean you don't need to bother. I hope it helps. I've an old system running 10.6 so I'll give that a look when I get a chance and see if the same can be done there.
I also went to the trackpad part of preferences and unchecked and checked the force click look-up option and it worked again.
Best Answer
What you are seeing are the OSX built in Text Services, such as Spelling and auto-correct services when dealing with anything in OSX that is text.
These services are automatic for the whole OS and cannot be turned off and are available in every application
Note: Spelling Auto-Correct can be turned off/managed in System Preferences -> Languages & Text -> Text
The "Services Manager" and the "Dictionary Service" only relate to what is shown and provided in the Services Menu within running applications. you can turn off those within (oddly enough) System Preferences -> Keyboard -> Keyboard Shortcuts -> Services