| diaster | <biology> A double star; applied to the nucleus of a cell, when, during cell division, the loops of the nuclear network separate into two groups, preparatory to the formation of two daughter nuclei. See Karyokinesis. Origin: Gr. - = twice + star. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| diastereoisomers | Optically active isomers that are not enantiomorphs (mirror images); e.g., d-glucose and d-galactose. (05 Mar 2000) |
| diastereomers | <chemistry> Optical isomers that are not mirror images of each other. (09 Jan 1998) |