The difference is that the printer builds a three-dimensional scaffolding out of a sugar-based material called a hydrogel.

VOA: special.2010.10.19

Some drug makers and other companies put three-dimensional images called holograms on their products as a security device.

VOA: special.2010.03.01

"The three laureates have accomplished what many scientists thought impossible, namely to determine the three- dimensional structure of the molecular machine that makes all the proteins in a cell, the so-called ribosome,"

VOA: standard.2009.10.07