Definition of Palma Christi in US English:

Palma Christi


  • Either of two plants with palmately lobed leaves: †(a) an unidentified medicinal herb, perhaps cut-leaved dead-nettle, Lamium hybridum (obsolete); (b) the castor oil plant, Ricinus communis.


Late Middle English; earliest use found in Practica Phisicalia John of Burgundy. From post-classical Latin palma Christi castor oil plant, also gromwell, species of orchid (1583 in a translation of Dodoens, from 1597 in British sources), lit. ‘palm or hand of Christ’, from the palmate shape of the leaves or tubers from classical Latin palma + Christī, genitive of Christus.