noun
pentose
A monosaccharide with five carbon atoms. Technical term used in biochemistry and organic chemistry.
リボースは五炭糖の一種である。
Ribose is a type of pentose.
単糖 is the broader category of monosaccharides; 五炭糖 is a specific subclass based on carbon count.
Compound of 五 (five), 炭 (carbon), and 糖 (sugar), reflecting the five-carbon structure of pentoses.