(n) large shrub of tropical Africa and Asia having large palmate leaves and spiny capsules containing seeds that are the source of castor oil and ricin; widely naturalized throughout the tropics, Syn.castor bean plant, palma christi, Ricinus communis, palma christ
(n) parasitic on sheep and cattle as well as humans; can transmit looping ill in sheep (acute viral disease of the nervous system); a vector for Lyme disease spirochete, Syn.Ixodes ricinus, sheep tick
The Collaborative International Dictionary of English (GCIDE) v.0.53
‖n. [ L., the castor-oil plant. ] (Bot.) A genus of plants of the Spurge family, containing but one species (Ricinus communis), the castor-oil plant. The fruit is three-celled, and contains three large seeds from which castor oil is expressed. See Palma Christi. [ 1913 Webster ]
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