semiplume

Related to semiplume: down feather, filoplume

semiplume

(ˈsɛmɪˌpluːm) ornithol
n
a semiplume feather
adj
(of a bird's feather) intermediate in appearance between a contour feather and a down feather, having a long shaft and a downy tip; such feathers are located beneath the bird's contour feathers and provide insulation
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The first feather coat was a covering of moderately long light grey down-like semiplumes. These were observable as subcutaneous dark dots by day 7-8 (Figure lb) and erupted through the skin by day 11-13.
Semiplumes lay under the contour feathers and over the down feathers.
The small white feathers that lie between and beneath the contour feathers are called semiplumes. They round out the body contours and provide insulation.