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[uhl-truh-thin] /ˌʌl trəˈθɪn/
extremely thin:
an ultrathin wristwatch.
Origin of ultrathin
1945-50; ultra- + thin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ultrathin
  • Researchers have made ultrathin refrigerators for microprocessors.
  • Bacteria coat your skin in an ultrathin protective armor, which helps keep harmful microbes at bay.
  • The sensor consists of an ultrathin gold film to which chemical receptors are attached.
  • It is delicious and comes with a salad and either fries or ultrathin house-made potato chips.
  • Probing a cement-based material with an ultrathin diamond needle makes an imprint on the order of nanometers.
  • Other companies are working on so-called ultrathin body transistors.

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