cyanide

the term cyanide originates from the greek word kyanos, referring to a dark blue mineral, specifically lapis lazuli. this connection arises because the compound potassium ferrocyanide, a source of cyanide, was first isolated from the pigment prussian blue. the suffix -ide was adopted from french chemical nomenclature in the early 19th century to systematically name compounds. thus, the word's literal history links a color to a class of chemicals, with the modern, highly specific meaning emerging from the field of scientific classification.

Structure: cyan (blue) + ide (chemical suffix) cyan is from greek kyanos, meaning 'dark blue'. ide is a suffix from the english modification of the french -ide, used in chemistry to denote a binary compound or a compound derived from another.