laburnine

Century Dictionary and Cyclopedia

1. n. A poisonous alkaloid found together with cytisin in the seeds of the common laburnum, to which their medicinal properties are partly due.

Wiktionary

1. n. organic chemistry A poisonous alkaloid found in the unripe seeds of the laburnum.

GNU Webster's 1913

1. n. (Chem.) A poisonous alkaloid found in the unripe seeds of the laburnum.