Cycloalkanes

Part of speech: noun

Definitions

1. A class of hydrocarbons characterized by a ring structure containing carbon atoms, with hydrogen atoms completing the tetravalency of the carbons present
2. Compounds that feature carbon atoms arranged in cyclic formations, thus forming a closed loop of organic molecules
3. Organic compounds that consist of a cyclic arrangement of carbon atoms, each bonded to hydrogen to maintain molecular stability

Etymology: Cycloalkanes are a chemistry term built by plain combination: "cyclo-" from the Greek "kuklos", meaning circle or ring, attached to "alkane", the name of the saturated hydrocarbon family. The "cyclo-" prefix marks the carbon chain as closed into a ring rather than a straight or branched line, so a cycloalkane is an alkane whose carbons form a loop. The "kuklos" root is ancient and reaches English through Late Latin "cyclus" and Middle English "cicle", which became the modern "cycle". "Cyclic" comes from the same Greek stem through Classical Latin "cyclicus" and Middle French "cyclique". "Alkane" is the younger half. It was built in German from "alkohol" plus the chemical suffix "-an", with the "alk-" element tracing back through Arabic "kuhl", a powdered antimony compound used as eyeliner, which reached European chemistry via Medieval Latin "alcohol". The "-yl" and "-an" endings were added by German chemists as the field systematised its naming.