DSAE test file

prime, noun

Origin:
EnglishShow more Perhaps from English primary (wing-feather), or absolute use of adjective (see quotation 1881).
Ostrich-farming
A long, pure white feather of the highest quality, taken from the wing of a cock ostrich; white noun sense 1. See also blood, byock, feather sense a, wing.
[c1881 A. Douglass Ostrich Farming 80The sorter will first take in hand the cock’s quill feathers; these he will — feather by feather — sort first into heaps consisting of prime whites.]
1973 D.J. Maree in Std Encycl. of Sn Afr. VIII. 398The highest price for selected primes (whites) recorded on the London market before 1914 was £112 per lb.
A long, pure white feather of the highest quality, taken from the wing of a cock ostrich; whitenoun1.

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18811973