Obsolete (usage strongly discouraged) alternatives for, respectively, the prefixes
(+)- and (−)- [used to designate the sign of
optical rotation of
enantiomers under specified condition (and hence to distinguish the enantiomers)] and (±)- for
a
racemate.
Source:
PAC, 1996, 68, 2193
(Basic terminology of stereochemistry (IUPAC Recommendations 1996))
on page 2205