The Collaborative International Dictionary
Kiwikiwi
Kivikivi \Ki`vi*ki"vi\, Kiwikiwi \Ki`wi*ki"wi\, n.; pl. Kivikivies (?), Kiwikiwies. (Zo["o]l.) Any species of Apteryx, esp. Apteryx australis; -- so called in imitation of its notes. More commonly called kiwi. See Apteryx.
Wiktionary
kiwikiwi
n. ''Blechnum fluviatile'', the star fern or creek fern.