Dictionary.net

A toxic lectin from the seeds of jequirity, Abrus precatorius L. Very active poison. Five different proteins have so far been isolated: Abrus agglutinin, the component responsible for hemagglutininating activity, & abrins a-d, the toxic principles each consisting of two peptide chains are held together by disulfide bonds.

The poisonous principle of jequirity.

A toxin, containing a globulin and an albumin chiefly obtained from jequirity (Abrus precatorius).