medicaster
n.
"quack," c.1600, from Latin *medicaster (source also of Italian medicastro, French médicastre, 16c.), from medicus (see medical, adj.). The feminine form is medicastra. Compare also -aster.
〔李〕n. 江湖医生；庸医（medic n. 医生） ←-aster [L] 表示“低劣的⋯（人）”