castor bean

1. 1.

   the toxic seed of the castor-oil plant; source of castor oil

   Broaderoilseed

   Part ofcastor-oil plant

Questions about castor bean

What does castor bean mean?

castor bean means "the toxic seed of the castor-oil plant; source of castor oil".

Is castor bean a common word?

castor bean is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.