The Collaborative International Dictionary of English v.0.48:

Succinic \Suc*cin"ic\, a. [Cf. F. succinique. See Succinate.]
   (Chem.)
   Pertaining to, or derived from, amber; specif., designating a
   dibasic acid, C?H?.(CO?H)?, first obtained by the dry
   distillation of amber. It is found in a number of plants, as
   in lettuce and wormwood, and is also produced artificially as
   a white crystalline substance having a slightly acid taste.
   [1913 Webster]

WordNet (r) 3.0 (2006):

succinic
    adj 1: of or relating to or obtained from amber