1. the axis of a spikelet in grasses and sedges that bears the florets
Usage: botanical

Examples

• The botanist examined the rachilla to identify the grass species.
• Each floret is attached to the rachilla at a specific node.
• The rachilla becomes visible when the glumes are removed from the spikelet.
• In wheat, the rachilla is jointed and breaks easily during threshing.
• The length of the rachilla varies among different grass families.