maundy-thursday
Maun"dy Thurs"day. Etym: [OE. maunde a command, OF. mandé, L. mandatum, from mandare to command. See called from the ancient custom of washing the feet of the poor on this day, which was taken to be the fulfillment of the "new commandment," John xiii. 5, 34.] (Eccl.) Defn: The Thursday in Passion week, or next before Good Friday.