Nitrogen

Part of speech: noun

Pronunciation: /ˈnaɪ.tɹə.d͡ʒən/

Definitions

1. A colorless, odorless gas that makes up about 78% of Earth's atmosphere and is essential for all living organisms
2. A colorless and tasteless gas that constitutes a significant portion of the atmosphere, crucial for the formation of amino acids and nucleic acids essential for life
3. Comprising around 78% of the Earth's atmosphere, this inert gas plays a vital role in biological processes and chemical reactions

Etymology: The gas that makes up most of the air you breathe was named by a chemist who thought it was a component of a different substance. In 1790, the French chemist and physician Jean-Antoine Chaptal coined the French "nitrogène" for it, and English borrowed the term from that French form. His name for the gas was built from two parts: "nitro-", from "nitre," an old name for saltpetre (potassium nitrate), and "-gène," from Greek "-genes," meaning "producing" or "forming." Chaptal's idea was that the gas formed nitre when combined with other substances. The first part traces back further than the chemistry. "Nitre" passed through Latin "nitrum" from Greek "nitron," a word for a natural alkaline salt, and it may have been borrowed from an Egyptian or Semitic source, a route that explains its ancient pedigree. The "-gen" element comes from Greek "genos," "birth" or "kind," which chemists later used widely in the names of substances that produce or form others.