‖Ric″i‐nus (�), n.(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 is expressed. See Palma Christi.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.