A Webcam is a desktop or video camera whose output is placed on a web page either by displaying images at intervals or producing a live video stream. That web page is then viewable via the Internet. Webcams in operation around the world show everything from travel destinations, people, or offices.
A video camera with proper software connects to the internet through your computer. Commonly used for video conferencing or as an email attachment.
a device / camera sitting on top of your computer / laptop, which broadcast you or what is in the viewer