hiiri

Hiiri is a Finnish word meaning "mouse" that can refer to two distinct things: the mammal and the computer input device. In zoology, hiiri denotes several small rodents in the family Muridae, most commonly the house mouse (Mus musculus).

House mice are small, with body length around 6 to 9 cm and a tail of comparable length. They have soft fur and are omnivorous, feeding on grains, seeds, and plant material, as well as insects. They are highly adaptable and frequently inhabit human settlements, where they can reproduce quickly—up to several litters per year under favorable conditions. Ecologically, they serve as prey for many predators and as seed dispersers in some cases. In human environments they can be pests and may spread pathogens, contaminate food, and cause structural damage.

Computer mouse: The other sense of hiiri is the computer pointing device, used to move a cursor on a screen and to interact with software by clicking its buttons. The first practical computer mouse was developed in the 1960s, and modern mice commonly use optical or laser sensing to detect movement and are available wired or wireless. Typical models have two or more buttons and some include a scroll wheel; some also use additional inputs such as touch or gesture surfaces.