ultrathin

[ uhl-truh-thin ]

adjective

1. extremely thin:

   an ultrathin wristwatch.

Word History and Origins

Origin of ultrathin¹

First recorded in 1945–50; ultra- + thin

Example Sentences

Biomedical engineers at Duke University have developed a silk-based, ultrathin membrane that can be used in organ-on-a-chip models to better mimic the natural environment of cells and tissues within the body.

From Science Daily

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

Metalenses are ultrathin optical devices -- often just a fraction of a millimeter thick -- that use nanostructures to manipulate light.

From Science Daily

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

Or an unpleasant sight you can’t unsee, like the new Apple ultrathin iPad ad.

From Los Angeles Times