pteryla

An area on the skin of a bird from which feathers grow.

A feather-tract; one of the sets or clumps of feathers which are inserted in definite tracts or areas in the skin of a bird, separated by apteria, or places where no feathers grow.

One of the definite areas of the skin of a bird on which feathers grow; — contrasted with apteria.

One of the areas of a bird‘s skin on which feathers grow.