铅字 (鉛字) qiānzì

qiānzì noun lead type; type piece
Domain: Modern Chinese 现代汉语 , Subdomain: Publishing
Notes: Refers to the metal piece that contacts the paper printed (CC-CEDICT '鉛字'; Guoyu '鉛字'; Mathews 1931 '鉛字', p. 124)