ptarmic
/ˈtɑrˌmɪk/ (TAR-mik)
Definitions
1. adjective
Relating to or characteristic of ptarmigan.
“The ptarmic feathers made the winter camouflage effective.”
2. noun
A suffix used in the formation of names of birds, especially those that change color with the seasons.
“The ptarmic in ptarmigan refers to the bird’s seasonal color change.”