An Etymological Dictionary of Astronomy and Astrophysics

Of, resembling, or covered with fluff.

2. Light or airy (Dictionary.com).

Etymology (EN): From → fluff + -y adj. suffix, from O.E. -ig, cognate with L. -icus, → -ic.

Etymology (PE): Korkvâr “resembling fluff,” with -vâr, a suffix of possession, similarity, and aptitude (e.g., omidvâr, sezâvâr, sugvâr, šâhvâr, gušvâr), → -oid; korki adj. with -i.