dru·id also Dru·id 
(drĭd)
(drĭd)n.
A member of an order of priests in ancient Gaul and Britain who appear in Welsh and Irish legend as prophets and sorcerers.
[From Latin druidēs, druids, of Celtic origin; see deru- in the Appendix of Indo-European roots.]
dru·idic (dr-ĭdĭk), dru·idi·cal (-ĭ-kəl) adj.
dru·idi·cal·ly adv.
druid·ism n.