Onion - Taxonomy and etymology. 1  The onion plant (Allium cepa), also known as the bulb onion [5] or common onion, [6] is the most widely cultivated species of the genus Allium. 2  Allium cepa var. aggregatum â G. Don. 3  Allium cepa var. 4  Allium cepa var. 5  Allium cepa var. 6  Allium cepa var. 7  Allium cepa var. 8  Allium cepa var.
A URL is a URI. A URL is one type of Uniform Resource Identifier (URI); the generic term for all types of names and addresses that refer to objects on the World Wide Web. The term Web address is a synonym for a URL that uses the HTTP or HTTPS protocol.
Domain Names and URLs. The universal resource locator, or URL, is an entire set of directions, and it contains extremely detailed information. The domain name is one of the pieces inside of a URL. It is also the most easily recognized part of the entire address. When computer users type a web address directly into the field at the top of their browser window, it initiates a process of locating the page requested.