[cad.re] n [F, fr. It quadro, fr. L quadrum square--more at quarrel] (1830) 1: frame, framework
2: a nucleus or core group esp. of trained personnel able to assume control and to train others; broadly: a group of people having some unifying relationship "a ~ of lawyers"
3: a cell of indoctrinated leaders active in promoting the interests of a revolutionary party
4: a member of a cadre