hypoptilum
Noun
Meaning
An accessory plume arising from the posterior side of the stem of the contour feathers of many birds; -- called also aftershaft. See Illust. of Feather.
Source: Webster's dictionaryNoun
An accessory plume arising from the posterior side of the stem of the contour feathers of many birds; -- called also aftershaft. See Illust. of Feather.
Source: Webster's dictionary