primer
1. prim.er \'prim-*r, esp Brit 'pri--m*r\ n [ME, fr. ML primarium, fr. LL, neut. of primarius primary] 1: a small book for teaching children to read 2: a small introductory book on a subject 2. prim.er \'pri--m*r\ n 1: a device for priming; esp : a cap, tube, or wafer containing per cussion powder or compound used to ignite an explosive charge 2: PRIMING