The root of a feather is called the "calamus." It is the hollow shaft at the base of the feather that anchors it to the bird's skin or follicle. The calamus is crucial for the feather's attachment and stability, allowing it to function properly in flight and insulation.
Plume
birdy
Quill pen
A feather bedder
A Quill
Mexican Feather Grass is a monocot, belonging to the family Poaceae. It is characterized by having long, narrow leaves with parallel veins and a fibrous root system.
A pen with a feather is called a quill pen. It was commonly used for writing before modern pens were invented.
The root word "pen" comes from the Latin word "penna," which means feather. This root is commonly found in words related to writing or drawing, such as penmanship, penumbra, and penitentiary.
The principal square root.
you call it a square root. that's so corny but true.
The answer to the calculation is simply called the square root.
I believe that they call it a "brave feather", so it would be for courage... that however, you could not get until you were a man. Seeing as boys are not brave in battle.