diosen.
/ˈdʌɪəʊz//ˈdʌɪəʊs/ Chemistry.
A generic term, analogous to triose, hexose, etc., for a ‘sugar’ containing two carbon atoms; the only possible one is glycolaldehyde, CHO·CH2OH.
ΚΠ
1904 Jrnl. Physical Chem. 8 509 Dioses, trioses, tetroses.
1948 W. Pigman Chem. Carbohydrates i. 17 Carbohydrates are usually classified according to the number of carbon atoms, e.g. pentoses, hexitols, heptonic acids. ‘Monose’, however, has been used as a short term for the preferred term ‘monosaccharide’, and also as a superfluous synonym for ‘formaldehyde’. Similarly, glycolic aldehyde is called a ‘diose’, whereas the ending ‘-biose’ denotes a disaccharide, as in ‘melibiose’ and ‘gentibiose’.
This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018).
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