Ricinus

noun

1. a genus of herb having only one known species: castor-oil plant

   noun.plant

   Synonyms genus ricinus

   Source: WordNet 3.0

2. A genus of plants of the Spurge family, containing but one species (<i>R. communis</i>), the castor-oil plant. The fruit is three-celled, and contains three large seeds from which castor oil iss expressed. See <u>Palma Christi</u>.

   noun

   Source: webster1913