4 syllables: A, ce, ty, lene. Stress on ce.
uh-SET-uh-leen
/əˈsɛtəˌlin/
Acetylene is pronounced uh-SET-uh-leen (/əˈsɛtəˌlin/). It has four syllables (A-ce-ty-lene), with the stress on "ce". Acetylene is a colorless, highly flammable hydrocarbon gas with the chemical formula C2H2, best known as the simplest alkyne. It is used as a fuel and chemical feedstock. In air, it forms explosive mixtures at relatively low concentrations and is typically generated by the reaction of calcium carbide with water.
nounAcetylene is a colorless, highly flammable hydrocarbon gas with the chemical formula C2H2, best known as the simplest alkyne. It is used as a fuel and chemical feedstock. In air, it forms explosive mixtures at relatively low concentrations and is typically generated by the reaction of calcium carbide with water.
How to Pronounce Acetylene
"The welder used an acetylene torch for the arching weld."
"Industrial chemistsstore acetylene in special cylinders for cutting and welding."
"Acetylene can decompose violently if mixed with air and compressed improperly."
You say ac-et-yl-ene with primary stress on the second syllable: /ˌæsɪˈtiːliːn/. Break it as a-CET-yl-ene. Start with /ˌæ/ (short a) as in cat, move to /sɪ/ like sit, then /ˈtiː/ (long E), then /liːn/ (leen). The syllable boundary is clear: a-CE-t-ylene, but the natural flow is ac-ET-i- lene. In careful speech, emphasise the /tiː/ vowel and keep the final /n/ lightly nasalized. For audio, you can reference standard dictionaries or Pronounce resources for exact waveform guidance.
Two common errors: (1) Misplacing stress on the first syllable as ac-ET-ylen rather than ac-e-TY-lene; (2) Diluting the long /iː/ in -ylene to a short /ɪ/ or /ɪə/ sound, producing a nonstandard /ˌæsɪˈtɪlən/. Correct by pronouncing /tiː/ clearly and keeping /liːn/ as a long E-N ending. Practice with minimal pairs like acetylene vs ethylene to feel the difference in -ylene morpheme. Listen to native speakers via Pronounce or YouGlish to calibrate rhythm and vowel length.
In US, UK, and AU, the core sequence /ˌæsɪˈtiːliːn/ remains, but rhotics and vowel duration subtlety vary. US speakers may have more vowel length distinction and a heavier /r/ absence (no r). UK/AU generally maintain non-rhoticity, with slightly shorter /iː/ in some dialects. In all, the final -ene is /iːn/. Practice listening to regional recordings and compare using IPA references to confirm the long /iː/ quality across accents.
The difficulty lies in the multi-syllabic length and the long /iː/ in -ylene, followed by a final /n/ nasal that often weakens in fluent speech. Also, the unstressed first syllable a- can reduce to a schwa in fast talk, while the mid-stress on -cet- may be misapplied. Tackle with slow, deliberate pronunciation first, then blend into natural pace. IPA cues: /ˌæsɪˈtiːliːn/ help maintain accuracy while you speak.
Notice the consonant cluster in the middle -t-yl-: /ˈtiːliː/ combined with a light /l/ onset for -ly-. Practically, you should articulate the plosive /t/ strongly but keep the following /j/ sound implicit in the -yl- sequence without creating an extra syllable. The blend a-CE-t-ylene results in a crisp /s/ after the short a, then the long /iː/ before the final nasal. Focus on flowing the syllables while preserving the long vowel in -ylene.
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Acetylene comes from the prefix aceti- (Latin for vinegar) in combination with the Greek word hyle (matter), through the chemical naming tradition that linked the compound to its method of production from acetyl groups and to the overall family of alkynes. The term was adopted in the 19th century as chemists explored hydrocarbons with triple bonds. The root acet- reflects acetyl-derived chemistry rather than vinegar itself, illustrating how early chemists named reactive, simple hydrocarbons. First used in English in the 1860s after notable investigations into the hydrocarbon C2H2, acetylene’s name has since become standard across chemistry and industrial contexts, with “ethyne” used more in formal chemical literature while “acetylene” remains common in welding, lighting, and industrial discourse.
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💡 These words have similar meanings to "Acetylene" and can often be used interchangeably.
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Words that rhyme with "Acetylene"
-ine sounds
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