Definition of pin feather in English:

pin feather

noun

Ornithology
  • An immature feather, before the veins have expanded and while the shaft is full of fluid.

    • ‘Cockatiels are born nearly naked and pin feathers start to appear at about seven days.’
    • ‘He could feel the pin feathers, and the grossness of its shape.’
    • ‘They grew in much the same way Crixa's did, but small, white and red-brown pin feathers began to layer themselves over the bone and muscle.’
    • ‘On that particular afternoon I recall a lot of references to ‘pin feathers’ interspersed with colorful expletives.’
    • ‘Changes in the physical structure of the pin feather during growth may be the most likely explanation for the increased resistance to heat loss in both groups of birds.’
    plume, quill
    View synonyms