3 syllables: di, lu, tions. Stress on lu.
/dɪˈluːʃənz/
Say it backDilutions refers to processes or results of making a solution thinner or weaker by adding a solvent, or to the act of reducing concentration in a sample. In science and lab work, dilutions are used to achieve a desired concentration for accurate measurement, reaction control, or safety. The term can also describe the diminished strength or force of something when diluted.
"The lab protocol requires serial dilutions to obtain a measurable range of concentrations."
"During the experiment, the team performed a series of dilutions to calibrate the assay."
"Check the label for the correct dilutions of the reagent before use."
You say di-LU-tions, with primary stress on the second syllable. The IPA is /dɪˈluː.ʃənz/ for US and UK. Start with a short i as in 'dip,' then the long u sound in the stressed syllable, followed by a weak schwa in the second vowel and the final z sound. Tip: keep the 'loo' light but clear, not swallowed; end with a soft 'z' rather than a hard 's' in plural. Audio reference: [IPA guide audio].
Common errors: 1) Misplacing stress on the first syllable (di-LU-tions is incorrect in many contexts). 2) Slurring the middle /luː/ into a short /lʊ/ or /lu/ causing ‘dih-LU-tshuns’. 3) Final nz vs nz or z endings; ensure /ənz/ or /nz/ is clear. Correction: pronounce the long /uː/ clearly in syllable two, and end with a voiced alveolar sibilant /z/ sound. Practice with minimal pairs like dilutions versus delusions to feel the contrast in vowel length.
Across US/UK/AU, the primary difference is vowel quality and rhoticity. US and AU typically have rhotic vowels; /ɪ/ near the beginning is consistent, but /ˈluː/ can be slightly longer in US. UK often features non-rhotic rhoticity in some speakers, but most educated speakers produce /ɪˈluː.tjənz/ with a clear, rounded /uː/ and a post-high /ə/ before the final /nz/. The final /z/ is generally universal; vowel reductions in the second syllable can vary by tempo and register.
The difficulty lies in the three-syllable rhythm with a stressed middle syllable and a long, tense /uː/ in the second syllable, followed by a light /ənz/ cluster. Some speakers shorten /ˈluː/ or blur /ʃən/ into /tʃən/ or /sən/. Also, the plural ending /-z/ can be devoiced in rapid speech. Focus on keeping the middle vowel long and the final /z/ voiced yet soft; practice with slow syllable isolation.
A unique aspect is managing the transition from the long /uː/ to the unstressed /ə/ in the third syllable, which can trip speakers who expect a stronger vowel in every syllable. The sequence is /dɪ/ + /ˈluː/ + /.tʃən/ + /z/. Keep the /t/ crisp to avoid blending into the following /tʃ/; ensure the /jən/ cluster isn’t pronounced as /dʒən/. Slow practice helps synthesize the alveolar stop, the palatal quality of /tʃ/, and the final voiced /z/.
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The word dilution comes from the Latin dilutio, from diluere ‘to wash away, to dilute,’ itself from the prefix dis- ‘apart, away’ + luere ‘to wash.’ In English, dilution appeared by the 15th–16th centuries in scientific and alchemical contexts as a process of reducing strength or concentration by adding a solvent. The sense broadened with the rise of chemistry and pharmacology in the 17th–19th centuries, where precise concentration control became essential for experiments and medical formulations. The term has since become a standard noun and plural form, dilutions, used for multiple steps or series of dilution processes in protocols, assays, and quality control. First known uses appear in Latin scientific treatises and later English translations, where “dilutio” described thinning of liquids, later specialized to chemistry and medicine as “dilution.”
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💡 These words have similar meanings to "dilutions" and can often be used interchangeably.
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Words that rhyme with "dilutions"
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