ultrathin

American  

[uhl-truh-thin] / ˌʌl trəˈθɪn /

adjective

1. extremely thin.

   an ultrathin wristwatch.

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Etymology

Origin of ultrathin

First recorded in 1945–50; ultra- + thin

Example Sentences

The cables themselves often contain dozens or hundreds of flexible, ultrathin glass fibers to carry signals.

From The Wall Street Journal • Feb. 7, 2026

Elsewhere in the plant, workers cut the ingots into ultrathin wafers using diamond wire saws.

From Barron's • Nov. 7, 2025

They observed that these cells were able to send signals across the ultrathin membrane, which helped the cells differentiate into glomerular cells, podocytes and vascular endothelial cells.

From Science Daily • Jun. 6, 2024

Apple had intended the ad to send the opposite message, that its ultrathin iPad Pro could power an array of creative activities that previously required individual tools.

From New York Times • May 9, 2024

My AboundSound audio system consisted of an array of ultrathin speakers mounted on the apartment’s walls, floor, and ceiling, providing 360 degrees of perfect spatial pin-drop sound reproduction.

From "Ready Player One: A Novel" by Ernest Cline