plekˈsiməd.ə(r) noun
Etymology: Greek plēxi s stroke (from plēssein to strike) + English -meter — more at plaint
: a small hard flat plate (as of ivory) placed in contact with the body to receive the blow in mediate percussion
• plex·i·met·ric |pleksə|me.trik adjective
• plex·im·e·try plekˈsimə.trē noun -es