2 syllables: Pi, co. Stress on Pi.
PEE-koh
/ˈpikoʊ/
Pico is pronounced PEE-koh (/ˈpikoʊ/). It has two syllables (Pi-co), with the stress on "Pi". Pico is a noun used in physics and electronics to denote a factor of one trillionth (10^-12) or, in geography, a small peak or summit. It also appears as a proper noun in various contexts, including personal names and brand/product titles. In everyday language, it commonly signals a tiny amount or unit, often in scientific or technical discussions.
nounPico is a noun used in physics and electronics to denote a factor of one trillionth (10^-12) or, in geography, a small peak or summit. It also appears as a proper noun in various contexts, including personal names and brand/product titles. In everyday language, it commonly signals a tiny amount or unit, often in scientific or technical discussions.
- You may over-enunciate the second syllable, turning pico into a drawn-out two-syllable word; correct by dialing back the second vowel to a mid-back rounded sound and keep the transition quick. - Another mistake is flattening the first syllable to a short i, leading to /ˈpɪˌkoʊ/ instead of /ˈpiː.kəʊ/. Emphasize the long /iː/ with a higher jaw position early in the nucleus. - Some speakers merge the two syllables into a single syllable or insert a schwa too early; maintain two distinct vowels with a subtle boundary, then glide to the second vowel. - In fast speech, the second vowel may become weak; stay on the /əʊ/ or /koʊ/ quality by keeping the lips rounded and finishing with a clear lip rounding on the /ʊ/ transitioning sound.
"The pico- farad is a unit of capacitance in early electronic theory."
"We observed a pico- second delay in the signal processing chain."
"The Pico Mountains are a modest range at the edge of the desert."
You pronounce it as PEE-koh, with the primary stress on the first syllable: /ˈpiː.kəʊ/ in UK and US; in US contexts you may hear /ˈpiː.kɒ/ or /ˈpiː.kəʊ/ depending on the subsequent unit. For consistency, treat it as two syllables, the first a long E, the second an open O or əʊ depending on the following term. If you’re saying a unit like picofarad, keep the flow and avoid extra syllables after the first two.
Common mistakes include shortening the second syllable too much (piko) or merging the words too abruptly in a compound (pico-) with an unclear second vowel. Another error is dialing the vowel in the second syllable to a short i or inconsistent /əʊ/ vs /oʊ/ due to regional influence. Correct by keeping the second syllable as a clean, mid-to-high back rounded vowel (kəʊ in RP, kəʊ or ko in US) and ensure a slight separation between syllables without dragging the first syllable.
In US usage, you’ll often hear /ˈpiː.koʊ/ with a long E and a rounded /oʊ/ in the second syllable; in UK pronunciation the second syllable is commonly /-kəʊ/ with a lighter, unstressed second syllable and a more clipped final vowel; in Australian English, the second syllable leans toward /-kəʊ/ as well, with a slightly broader vowel in the first syllable and less rhoticity. Overall, US favors a tighter first syllable and /oʊ/; UK and AU may show subtler second-syllable rounding and less emphasis on /r/ influence.
The challenge lies in the two-syllable structure with a long first vowel and a rounded second vowel that can shift depending on following units. Speakers often mispronounce the second syllable as /-po/ or /-poʊ/ with an off-glide, or they misplace the primary stress, making it sound like a one-syllable or trochaic word. Focus on two clear syllables, maintain the /iː/ vowel in the first syllable, and finish with a stable /koʊ/ (or /kəʊ/ in British/Australian variants).
There is no silent letter in pico. The word is pronounced with two fully pronounced syllables: /ˈpiː.kəʊ/ (US) or /ˈpiː.kəʊ/ (UK/AU). The second syllable carries the round vowel, and the first syllable holds the long /iː/. The tip is to articulate each syllable cleanly, then blend them with a quick, natural transition rather than a choppy break.
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- US: Pronounce /ˈpiː.koʊ/ with a crisp, clear /iː/; keep the /oʊ/ rounded and rising slightly at the end of the second syllable. No rhotic linking needed unless followed by an /r/-colored sound. - UK: /ˈpiː.kəʊ/ tends to have a slightly shorter /iː/ and a more centralized, rounded /əʊ/; keep the second vowel rounded and avoid a heavy /r/ influence. The second syllable often remains unstressed. - AU: /ˈpiː.kəʊ/ similar to UK, slightly broader vowel quality; the first syllable is steady with a longer /iː/ than some British variants. Practice linking to the second syllable with a smooth, almost seamless transition. - IPA references: US /ˈpiː.kəʊ/, UK /ˈpiː.kəʊ/, AU /ˈpiː.kəʊ/. Focus on two clear vowels and controlled lip rounding for the second syllable.
Pico derives from the Spanish word pico meaning ‘beak’ or ‘peak,’ which in turn traces to the Latin picus and the Proto-Indo-European root *pek- meaning ‘to strike or to fasten.’ In scientific usage, pico- as a metric prefix first appeared in the 1960s within the International System of Units (SI) to denote 10^-12. The prefix was coined alongside other multiples (nano-, micro-, milli-) to create a coherent scale for measuring extremely small quantities. As a metaphor, ‘pico’ retained the sense of a small peak or selected point, which aligns with many technical terms describing tiny dimensions or brief moments, such as pico-second. In linguistics and computer science, pico- is used as a bounding prefix in compound terms, maintaining consistency with SI conventions. First formal adoption occurred in scientific literature during mid-20th century standardization efforts, with widespread orthographic use established by the SI Brochure and subsequent technical documentation.
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Words that rhyme with "Pico"
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