1. A conveyor system or work area in a sawmill where freshly cut lumber is sorted, graded, and prepared for further processing or drying.
Usage: chiefly North American; forestry and lumber industry term; often used in plural form

Examples

• Workers on the greenchain sorted the freshly milled boards by size and grade.
• The greenchain operator positioned each piece of lumber for the next stage of processing.
• Modern sawmills have automated greenchains that increase efficiency and worker safety.
• She started her career working at the greenchain before moving into quality control.
• The greenchain is a critical part of the lumber mill's production workflow.