Environmental Protection. Didymo (Didymosphenia geminata), also known as rock snot, is a non-native invasive microscopic algae (diatom) that can produce large amounts of stalk material to form thick brown mats on stream bottoms. Didymo threatens aquatic habitat, biodiversity and recreational opportunities.
peripheral device - (computer science) electronic equipment connected by cable to the CPU of a computer; disk drives and printers are important peripherals.
You are here: Dictionary P-Definitions. Alternatively referred to as an auxiliary device, a peripheral is hardware input device or output device that gives a computer additional functionality.Peripheral devices, however, are not essential for the computer to perform it's basic tasks; they can' be though of as an enhancement to the user's experience.lternatively referred to as an auxiliary device, a peripheral is hardware input device or output device that gives a computer additional functionality.