pteryla

noun

pter·​y·​la ˈter-ə-lə 

plural pterylae ˈter-ə-ˌlē 

-ˌlī

: one of the definite areas of the skin of a bird on which feathers grow

Word History

Etymology

New Latin, from Greek pteron + hylē wood, forest

First Known Use

1867, in the meaning defined above