What does dehydrogenating mean?
"Dehydrogenating" is the present participle and gerund of "dehydrogenate," a technical verb meaning to remove hydrogen from a chemical substance. The process lies at the heart of many industrial transformations — for example, converting alcohols into aldehydes or ketones, or producing olefins from alkanes in petroleum refining — usually with the help of a catalyst or high heat. It also occurs throughout biology: enzymes known as dehydrogenases constantly dehydrogenate substrates during metabolism, extracting energy from food molecules. The word carries a strictly scientific register and appears mainly in chemistry, biochemistry, and engineering contexts. Its counterpart is "hydrogenating," which adds hydrogen rather than removing it. Understanding this term offers a window into how chemists describe reactions not by what is added, but by what is taken away.
verbPresent participle and gerund of 'dehydrogenate': to remove hydrogen from a chemical compound, typically by chemical or enzymatic reaction.
- To remove hydrogen atoms from a molecule, as in an industrial catalytic process.
- To carry out such removal biochemically, as enzymes do in cellular metabolism.
"The catalyst works by dehydrogenating the alcohol to form the corresponding aldehyde."
"Industrial plants spend enormous energy dehydrogenating butane to produce butadiene for synthetic rubber."
"In the liver, alcohol dehydrogenase begins dehydrogenating ethanol almost immediately after consumption."
Every time your body turns alcohol into vinegar-like acetic acid, it is quietly dehydrogenating — chemistry's version of taking something away rather than adding.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dehydrogenating
The word combines the prefix "de-" (from Latin, indicating removal) with "hydrogen," itself coined in the late 18th century from Greek roots: "hydro-" (water) and the suffix "-gen" (from Greek "gennan," to produce), because hydrogen was first identified as the element that produces water when burned. "Dehydrogenate" emerged in 19th-century chemistry alongside related formations like "dehydrate" and "decarboxylate." It shares these Greek roots with words such as "hydrous," "hydrate," "genetic," and "genesis."
Related word forms
How dehydrogenating is actually used
Strictly technical register, found almost exclusively in chemistry, chemical engineering, and biochemistry. It functions both as the progressive verb form ('the enzyme is dehydrogenating the substrate') and as a gerund/noun ('dehydrogenating alcohols is a key industrial step').
Easily confused with dehydrogenating
Hydrogenating means adding hydrogen to a compound, whereas dehydrogenating means removing it.