2 syllables: ke, tone. Stress on ke.
KEE-tohn
/ˈkitoʊn/
ketone is pronounced KEE-tohn (/ˈkitoʊn/). It has two syllables (ke-tone), with the stress on "ke". Ketone refers to a class of organic compounds characterized by a carbonyl group (C=O) bonded to two carbon atoms. In chemistry, ketones include acetone as the simplest member. In biology and medicine, the term appears in discussions of metabolism and ketone bodies. Clear understanding requires distinguishing ketones from aldehydes, which have a terminal carbonyl group.
Ketone refers to a class of organic compounds characterized by a carbonyl group (C=O) bonded to two carbon atoms. In chemistry, ketones include acetone as the simplest member. In biology and medicine, the term appears in discussions of metabolism and ketone bodies. Clear understanding requires distinguishing ketones from aldehydes, which have a terminal carbonyl group.
"- The study focused on ketone bodies produced during fasting."
"- Acetone is the simplest ketone and is used as a solvent."
"- Researchers investigated ketone synthesis in organic reactions."
You pronounce ketone as /ˈkiːˌtoʊn/ in US English and /ˈkiːˌtəʊn/ in UK English. The stress falls on the first syllable: KE-tone. The second syllable begins with a long o sound. Make sure the /t/ is a light, crisp stop and finish with /n/. Notice the two-syllable rhythm with a slight pause between the first and second vowel cluster due to the diphthong in the second syllable.
Common errors include saying /ˈkɛtoʊn/ with an open front vowel in the first syllable and merging the two syllables into one, or pronouncing the second syllable as a hard /ˈtoan/. Correct by keeping the first syllable with a long /iː/ as in ki:, and clearly articulating the /oʊ/ or /əʊ/ in the second syllable. Use a light /t/ rather than a heavy stop and finish with a soft /n/.
In US English, KE-tone uses /ˈkiːˌtoʊn/ with a robust /ˈoʊ/ diphthong in the second syllable. In British English, it’s /ˈkiːˌtəʊn/ where the second syllable has /əʊ/ and a schwa-like middle vowel reducing stress on the second syllable. Australian English aligns closely with UK, typically /ˈkiːˈtəʊn/ with minor vowel length differences and non-rhoticity general patterns. Across all, the first syllable remains stressed; the main variation is the second-syllable vowel quality and articulation of the nasal ending.
The difficulty lies in the contrast between the long vowel in the first syllable and the quick, rounded second-syllable vowel, along with a crisp /t/ transition before the final /n/. The sequence /kiːˈtoʊn/ or /kiːˈtəʊn/ can trip non-native speakers when coordinating the lip rounding for /oʊ/ with the alveolar /t/. Practice isolated vowels and the quick sequence of consonants to smooth the transition.
Ketone’s second syllable features a rounded back vowel in many dialects, especially US /oʊ/ or UK /əʊ/, that demands slight lip rounding while maintaining a forward tongue position for the preceding /t/. It is important to avoid turning the /t/ into a flap in careful reading; keep it as a clean alveolar stop to preserve syllable boundary and avoid slurring into the /n/.
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US: /ˈkiːˌtoʊn/ with rounded lips for /oʊ/, rhoticity applies to surrounding vowels. UK: /ˈkiːˈtəʊn/ less rhotic influence; /əʊ/ provides a mid-back rounded vowel. AU: /ˈkiːˈtəʊn/ similar to UK; listen for the subtle reduction of the second syllable vowel and the tendency toward less pronounced r-colouring. Key differences: US tends to preserve rhotic vowel shapes; UK/AU favor a shorter, more centralized second syllable vowel. IPA references help: /ˈkiːˌtoʊn/ vs /ˈkiːˌtəʊn/.
Ketone comes from the German keton, which itself derives from the older term for a carbonyl compound with two hydrocarbon groups. The root concept centers on the carbonyl group (C=O) bonded to two carbon substituents. The word entered English usage in the 19th century as organic chemistry formalized the nomenclature for carbonyl compounds. Early chemists sought a systematic way to name classed species, assigning the “-one” suffix to indicate a carbonyl-bearing ketone, contrasted with “-al” for aldehydes and “-one” in other contexts for ketones with varied substitution. Over time, acetone popularized the term due to its prominence as a simple, widely used ketone solvent, reinforcing the generic label for this functional group. The broader chemical lexicon expanded to include substituted ketones, aromatic ketones, cyclic ketones, and diketones, with ketone bodies in biology drawing attention to physiologically relevant molecules such as acetoacetate, beta-hydroxybutyrate, and acetone. The word’s usage has thus traversed from abstract organic chemistry to practical applications in solvents, metabolism, and pharmaceuticals, maintaining a consistent reference to the carbonyl-bearing structure that defines this functional class.
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Words that rhyme with "ketone"
-one sounds
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