Editing Aldehyde (section)

===Etymology===
The word ''aldehyde'' was coined by [[Justus von Liebig]] as a contraction of the Latin {{lang|la|'''al'''cohol '''dehyd'''rogenatus}} (dehydrogenated alcohol).<ref>Liebig, J. (1835) [https://books.google.com/books?id=85c5AAAAcAAJ&pg=PA289 "Sur les produits de l'oxidation de l'alcool"] (On the products of the oxidation of alcohol), ''Annales de Chimie et de Physique'', '''59''': 289–327. From page 290: "Je le décrirai dans ce mémoire sous le nom ''d'aldehyde''; ce nom est formé de ''alcool dehydrogenatus''." (I will describe it in this memoir by the name of ''aldehyde''; this name is formed from ''alcohol dehydrogenatus''.)</ref><ref>{{Citation |last=Crosland |first=Maurice P. |title=Historical Studies in the Language of Chemistry |publisher=Courier Dover Publications |year=2004 |url=https://books.google.com/books?id=kwQQaltqByAC&q=alcohol+dehydrogenatus&pg=PA297 |isbn=9780486438023}}.</ref> In the past, aldehydes were sometimes named after the corresponding [[Alcohol (chemistry)|alcohol]]s, for example, ''vinous aldehyde'' for [[acetaldehyde]]. (''Vinous'' is from [[Latin]] {{lang|la|vinum}} "wine", the traditional source of [[ethanol]], cognate with ''[[Vinyl group|vinyl]]''.)

The term ''formyl group'' is derived from the [[Latin language|Latin]] word {{lang|la|formica}} "ant". This word can be recognized in the simplest aldehyde, [[formaldehyde]], and in the simplest carboxylic acid, [[formic acid]].