The Collaborative International Dictionary of English v.0.48:
Nankeen \Nan*keen"\, n. [So called from its being originally
manufactured at Nankin (Nanjing), in China.] [Written also
1. A species of cloth, of a firm texture, originally brought
from China, made of a species of cotton (Gossypium
religiosum) that is naturally of a brownish yellow color
quite indestructible and permanent.
2. An imitation of this cloth by artificial coloring.
3. pl. Trousers made of nankeen. --Ld. Lytton.
Nankeen bird (Zool.), the Australian night heron
(Nycticorax Caledonicus); -- called also quaker.