string·er 
(strĭngər)
(strĭngər)n.
1. One that strings: a stringer of beads.
2. Architecture
a. A long heavy horizontal timber used as a support or connector.
b. A stringboard.
3. Sports A member of a specified string or squad on a team. Often used in combination: a first-stringer; a second-stringer.
4. A part-time or freelance correspondent for the news media.