Having an expanded, or fan-shaped, tail.(adjective)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "fan-tailed" in a sentence
"The fan-tailed peacock pictured below was the signature design of the Akstafa, a single group of Kazak weavers living southwest of the Georgian capital of Tbilisi."
"The nomadic tribes of the Caucasus often added birds to their rugs, but only the Kazaks in the Shirvan district near Tbilisi used this particular type of fan-tailed peacock to represent prosperity."
"Some Caucasian groups like the Karabaghs near the southern border of modern-day Iran sold rugs to outsiders by the dozen, but only one town in the Shirvan district ever made rugs featuring fan-tailed birds, called Akstafas, by which their rarer rugs are now known."