indusium
(noun) a membrane enclosing and protecting the developing spores especially that covering the sori of a fern
Source: WordNet® 3.1
indusium (plural indusia)
(botany) A protecting membrane, especially that covering the developing spores of a fern.
Source: Wiktionary
In*du"si*um, n.; pl. Indu. Etym: [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.
Source: Webster’s Unabridged Dictionary 1913 Edition
17 March 2025
(noun) magnet made of a substance whose magnetization is proportional to the strength of the magnetic field applied to it
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