Wiktionary
tricam
n. A type of protection device used in climbing, that provides a means of placing temporary anchor points on the rock.
Wikipedia
Tricam
A Tricam is a type of climbing protection equipment. A versatile nut/cam hybrid, the Tricam was invented by Greg Lowe in 1973, and came to market in 1981. They are currently manufactured by C.A.M.P. of Premana Italy.