rachis

the rachis of the feather supports the barbs.

in botany, the rachis is the main axis of a compound leaf.

the rachis can be found in various plants and animals.

the structure of the rachis is crucial for flight in birds.

researchers study the rachis to understand its function.

the rachis connects the leaflets in a compound leaf.

in some species, the rachis is quite flexible.

the rachis plays a significant role in the plant's growth.

birds often preen their feathers along the rachis.

the rachis can vary in thickness depending on the species.