You searched for: “pennaceous
pennaceous, penniform
Like a plume or feather.

Pennaceous feathers have a central shaft (or rachis, "main axis or shaft") with vanes branching off to either side.

These vanes are also called "barbs", that are connected to one another with barbules (pointed projections), or tiny strands that criss-cross to form a kind of mesh that holds all the barbs together and with each other.

This entry is located in the following unit: penna- + (page 1)