zinco-

Century Dictionary and Cyclopedia

1. n. A plate in relief for printing, made by etching with acid a design on prepared zinc.
2. To etch with acid a zinc plate containing on its surface a design intended for printing by typographic methods.

Wiktionary

1. containing, or combined with, or using zinc

GNU Webster's 1913

1. A combining form from zinc; in chemistry, designating zinc as an element of certain double compounds. Also used adjectively.