http://www.ck12.org Chapter 27. Glossary
27.21 U
unit cell
The smallest portion of a crystal lattice that shows the three-dimensional pattern of the entire crystal.
unsaturated fat
A fat that consists of triglycerides whose carbon chains contain one or more carbon-carbon double bonds.
unsaturated hydrocarbon
A hydrocarbon that contains less than the maximum number of hydrogen atoms that can possibly bond with
the number of carbon atoms present.