ricinus Meaning, Definition & Usage

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

WordNet

Ric"i*nus noun
Etymology
L., the castor-oil plant.
Definitions
  1. (Bot.) A genus of plants of the Spurge family, containing but one species (R. communis), the castor-oil plant. The fruit is three-celled, and contains three large seeds from which castor oil iss expressed. See Palma Christi.

Webster 1913