Acetaldehyde

Part of speech: noun

Pronunciation: /ˌæs.ɪˈtæl.dəˌhaɪd/

Definitions

1. A clear, flammable liquid that acts as a key intermediate in organic chemistry and results from ethanol oxidation, it is crucial in producing various industrial chemicals and plastics while also participating in human metabolic processes
2. A volatile, colorless substance that serves an important role as an intermediate in organic synthesis stemming from ethanol oxidation, it contributes to the manufacture of plastics and chemicals and has a significant role in human metabolism
3. A colorless and volatile liquid that plays a vital role in organic chemistry as an intermediate produced through the oxidation of ethanol, it is essential in the production of chemicals and plastics while also being involved in human metabolic activity

Etymology: Acetaldehyde is a compound name built from two older chemical terms. Its first part, "acet-", comes from Latin "acetum", meaning vinegar, the same source as "acetic" and ultimately linked to the notion of sourness. The Latin word itself grew out of the Italic root for "to be sour," a sense that survives in the vinegar-related chemistry that produced the prefix. The second part, "aldehyde," is a 19th-century coinage made by the German chemist Justus von Liebig, shortened from "alcohol dehydrogenatum," meaning alcohol deprived of hydrogen. The "acet-" element entered chemical naming as a way of marking a compound related to acetic acid, the sharp component of vinegar. Acetaldehyde is the compound obtained when ethanol loses hydrogen, so the name links it to both drinking alcohol and the vinegar that results from its oxidation. Chemists combined the two stems to describe a substance that sits between them.