4 syllables: Mel, a, to, nin. Stress on to.
mel-uh-TOH-nin
/ˌmɛləˈtoʊnɪn/
Melatonin is pronounced mel-uh-TOH-nin (/ˌmɛləˈtoʊnɪn/). It has four syllables (Mel-a-to-nin), with the stress on "to". Melatonin is a hormone produced by the pineal gland that helps regulate sleep-wake cycles. It is commonly synthesized as a supplement to aid sleep and circadian rhythm management. The term combines the amino-acid motif mel- with the Greek -tonin, reflecting its chemical naming lineage.
nounMelatonin is a hormone produced by the pineal gland that helps regulate sleep-wake cycles. It is commonly synthesized as a supplement to aid sleep and circadian rhythm management. The term combines the amino-acid motif mel- with the Greek -tonin, reflecting its chemical naming lineage.
How to Pronounce Melatonin
"I take melatonin to help adjust to jet lag after crossing time zones."
"The melatonin supplement is often used for short-term insomnia relief."
"Researchers study melatonin’s role in seasonal affective disorders and sleep disorders."
Pronounce as /ˌmɛləˈtoʊnɪn/ in US and /ˌmel.əˈtəʊ.nɪn/ in UK/AU. Emphasize the second syllable stressed on -to- with a clear long 'o' in 'to' and a light second 'n' ending. Mouth: start with a relaxed mid-front vowel on ‘mel-’, then a schwa-like 'ə' before the stressed 'to' which uses a long o. End with a crisp ‘n ɪn’ where the second 'i' is a short i sound. Audio reference: listen to Cambridge/Oxford dictionaries or Forvo entries for native speakers saying ‘melatonin’.
Common errors include flattening the stress to the first syllable (mel-uh-TAH-nin) and mispronouncing the long 'o' as a short 'o' (to-nin). Another error is pronouncing the ending as -in instead of -ɪn with a light final consonant. Corrections: stress the second syllable -to-, use a clear long o /oʊ/ in that syllable, and finish with a soft nasal /n/ plus a short /ɪn/ rather than a drawn-out ending. Practicing slower: /ˌmɛləˈtoʊnɪn/ helps prevent drift in rapid speech.
In US, the rhythm places primary stress on the third syllable: mel-a-TO-nin with a strong /ˈtoʊ/. In UK, the second syllable carries emphasis more gently and the final '-nin' can be less emphasized; vowel qualities lean toward /əʊ/ in 'toʊ/ and a crisp /ɪn/ end. Australian tends to tap or reduce vowels slightly more, keeping /ˌmel.əˈtəʊ.nɪn/ with similar stress to UK but with broader vowel sounds due to Australian vowel shifts. Always check local dictionaries for nuanced vowels.
It’s difficult because of the three-syllable structure with a mid-stressed onset and a long, tense final vowel in the stressed syllable, plus the trailing -nin ending that can blur in fast speech. The combination of /ˌmɛlə/ leading into /ˈtoʊnɪn/ requires precise mouth positioning: a clear /oʊ/ in the stressed syllable, a tense mid‑back vowel in the second syllable, and a soft nasal ending. Practicing slow, then speed builds accurate articulation.
The word has a non-intuitive stem that is not a direct match to everyday roots. The sequence -to-nin ends with -nin, not -nine or -nin with a long i; ensure you don’t sound like ‘mel-a-tone-in’ (which misplaces stress and vowel lengths). Emphasize mel- as unstressed then -to- with a clear long 'o' before the final 'nin'. This word often appears in pharmacological texts, so keep it precise and clinical in tone.
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Melatonin derives from mel- (from the word melanin? actually melanin is unrelated) and the chemical suffix -tonin from serotonin’s naming pattern, but melatonin is not a direct serotonin derivative in nomenclature. The word was coined in the 20th century as the hormone’s function became understood; the ‘mel-’ likely echoes ‘melatonin’ being a hormone produced in the pineal gland and involved in melatonin’s relationship to the body’s clock. First known use in scientific literature appeared mid-20th century as researchers isolated and identified the molecule’s sleep-regulating properties. The root ‘-tonin’ aligns with other monoamine hormones in biochemical naming, though melatonin is a unique indoleamine. Over time, the term has become standard in physiology and pharmacology when discussing sleep regulation and supplements.
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Words that rhyme with "Melatonin"
-ion sounds
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