Search Result for "fern seed":
Wordnet 3.0

NOUN (1)

1. the asexual spore of ferns that resembles dust; once thought to be seeds and to make the possessor invisible; 



WordNet (r) 3.0 (2006):

fern seed
    n 1: the asexual spore of ferns that resembles dust; once
         thought to be seeds and to make the possessor invisible