| d- The symbol for dextrorotatory. |
| D- In biochemistry, a symbol used as a prefix to indicate the spatial configuration of certain organic compounds with asymmetric carbon atoms. It is used if an organic compound has a configuration about an asymmetric carbon atom analogous to that of D-glyceraldehyde (the arbitrarily chosen standard), in which the hydroxy (OH) functional group is on the right side of the asymmetric carbon atom. [From dextrorotatory.] |
dex·tro·ro·ta·to·ry  (děk'strə-rō'tə-tôr'ē, -tōr'ē)  adj. Symbol d- Of or relating to an optically active chemical that rotates the plane of polarized light to the right, or clockwise: a dextrorotatory solution. |
d- pref.
Relating to the configuration of d-glyceraldehyde, a compound chosen as the basis for stereochemical nomenclature because it is the simplest carbohydrate that can form optical isomers: d-fructose.
d- pref. d-
To the right; dextro: d-tartaric acid.