A dyke (or dike) in geology is a type of later vertical rock between older layers of rock. Technically, it is any geologic body which cuts across:1  flat wall rock structures, such as bedding. dyke (or dike) in geology is a type of later vertical rock between older layers of rock. Technically, it is any geologic body which cuts across: 1  flat wall rock structures, such as bedding.
Another example would be the âdefault browserâ on your computer. Windows PCs come with Internet Explorer (the blue âEâ icon) as the default browser, just as Apple includes their own Safari browser as the default on their Mac computers.
Understanding Your Computer: Web Browsers. Web browsers allow you to navigate the internet. There are a variety of options available, so you can choose the one that best suits your needs. A web browser is an application that finds and displays web pages. It coordinates communication between your computer and the web server where a particular website lives..