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Definitions

imperceptible

[im-per-sep-tuh-buhl] / ˌɪm pərˈsɛp tə bəl /


Example Sentences

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"The patterned nanostructures are imperceptible to the human eye, about the size of the wavelength of visible light," Dionne adds.

From Science Daily • May 30, 2026

Methane gas may be imperceptible, but the garbage that produces it is not -- Tiltil's 17,000 inhabitants have grown increasingly concerned about the health impact of such drastic pollution.

From Barron's • May 13, 2026

But the opposite, reflective face bears an image incised in finely engraved lines that under normal conditions is virtually imperceptible to the naked eye.

From The Wall Street Journal • Nov. 12, 2025

The hum of the electric motor is imperceptible, and it is only at speed that the sound of the rolling wheels on the road breaks through.

From BBC • Sep. 3, 2025

Taisin glanced at Sister Ailan as if to ask permission, and when her teacher gave an almost imperceptible nod, she said haltingly, “I—I saw you on a beach—a beach made of ice.”

From "Huntress" by Malinda Lo




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