Search Result for "indusium": 
Wordnet 3.0

NOUN (1)

1. a membrane enclosing and protecting the developing spores especially that covering the sori of a fern;

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2 definitions retrieved:

The Collaborative International Dictionary of English v.0.48:

Indusium \In*du"si*um\, n.; pl. Indusia (-[.a]). [L., an under garment, fr. induere to put on: cf. F. indusie the covering of the seed spots of ferns.] (Bot.) (a) A collection of hairs united so as to form a sort of cup, and inclosing the stigma of a flower. (b) The immediate covering of the fruit dots or sori in many ferns, usually a very thin scale attached by the middle or side to a veinlet. (c) A peculiar covering found in certain fungi. [1913 Webster]
WordNet (r) 3.0 (2006):

indusium n 1: a membrane enclosing and protecting the developing spores especially that covering the sori of a fern