ricinus
noun
ric·i·nus
| \ ˈris-ᵊn-əs
\
\
Medical Definition of ricinus
1
capitalized
: a genus of plants of the spurge family (Euphorbiaceae) that have large palmate leaves and flowers with numerous stamens and include the castor-oil plant (R. communis)
2
: any plant of the genus Ricinus