tetrose

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A monosaccharide containing no more than four carbon atoms in its primary chain.

Century Dictionary and Cyclopedia

1. n. In organic chemistry, the class-name applied to those sugars which contain four atoms of carbon in the molecule.

Wiktionary

1. n. biochemistry A sugar or saccharide containing four carbon atoms.

GNU Webster's 1913

1. n. (Chem.) A monosaccharide derived from a certain alcohol.

WordNet 3.0

1. n. any monosaccharide sugar containing four atoms of carbon per molecule