nano

Nano is a prefix used in the metric system to denote one billionth of a unit. Its symbol is n, and it is applied to a wide range of measurements such as nanometer (nm), nanosecond (ns), and nanogram (ng). The prefix forms part of SI-derived units and is commonly used in science and engineering to express extremely small quantities. A nanometer, for example, is one thousandth of a micrometer and about 100,000 times smaller than a human cell.

In science and technology, nanoscale refers to structures roughly 1 to 100 nanometers in size. Nanotechnology is the multidisciplinary field that studies and exploits phenomena at this scale, enabling advances in electronics, materials science, energy, and medicine. Nanoparticles, nanotubes, and nanorods are among the engineered forms used to tailor properties such as strength, reactivity, and optical behavior.

In computing, nano refers to GNU nano, a free, terminal-based text editor for Unix-like systems. Designed as a simple alternative to more complex editors, nano provides on-screen help and straightforward keyboard shortcuts, making basic text editing accessible to newcomers while remaining useful for experienced users who prefer a non-modal interface.

In culture and naming, Nano can appear as a nickname or given name in various languages, and it is used as a brand or product name in some contexts. The term’s versatility arises from its concise form and its association with small-scale, precise, or technical contexts.