pterylosis Ornith.
(pt-, tɛrɪˈləʊsɪs)
[f. pteryla: see -osis.]
The arrangement or disposition of the pterylæ, or of the feathers, of birds.
| 1874 Coues Birds N.W. 590 Of the pterylosis it may be observed, after Nitzsch, that the general character is perfectly scolopacine. 1885 Proc. Zool. Soc. 175 The pterylosis of this Cuckoo is not widely different from that of Cuculus. |