partridge feather
noun
1(Usually in plural) feathers from partridges, valued medicinally, for personal adornment, etc., or for fly fishing.
2 Ceramics a type of glaze, originally used in China, resembling the pattern of a partridge's feather; usually attributive.
Origin
Mid 16th century; earliest use found in Thomas Blague (c1545–1611), dean of Rochester.