n. An aldopentose that occurs most often in polysaccharides such as hemicellulose and pectin.
the GNU version of the Collaborative International Dictionary of English
n. A sugar of the composition C5H10O5, obtained from cherry gum by boiling it with dilute sulphuric acid.
The Century Dictionary and Cyclopedia
n. A crystallizable sugar, C6H12O6, prepared by the action of sulphuric acid on arabin.
Word Usage
"If the mixture contains arabinose and the indicator dye, the difference between Ara+ and Ara− is revealed, as if by heating invisible ink: they show up as white and red colonies, respectively."