Bacterial parasites that cause disease are called pathogens. Among bacterial plant diseases are leaf spot, fire blight, and wilts; animal diseases caused by bacteria include tuberculosis, cholera, syphilis, typhoid fever, and tetanus.
Definition of cascade 1: a steep usually small fall of water; especially: one of a series 2 a: something arranged or occurring in a series or in a succession of stages so that each stage derives from or acts upon the product of the preceding
The cascade in CSS refers to the language's ability to assign priorities among author styles, the styles set by the web page itself, and user styles, the styles set by individual users' web browsers. CSS code is used in the web design field because it makes designing and editing web pages much easier. Before the advent of CSS, web developers would have to copy and paste the same formatting options to every single page on a site to dictate things like font size and color choices.