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indusium
(redirected from indusia)

   Also found in: Encyclopedia 0.01 sec.
in·du·si·um  (n-dz-m, -zh-, -dy-)
n. pl. in·du·si·a (-z-, -zh-)
An enclosing membrane, as that covering the sorus of a fern.

[Latin, tunic, perhaps alteration of Greek endusis, dress, from enduein, to sink into, put on : en-, in; see en-2 + duein, to sink.]

indusium [ɪnˈdjuːzɪəm]
n pl -sia [-zɪə]
1. (Life Sciences & Allied Applications / Botany) a membranous outgrowth on the undersurface of fern leaves that covers and protects the developing sporangia
2. (Life Sciences & Allied Applications / Zoology) an enveloping membrane, such as the amnion
[New Latin, from Latin: tunic, from induere to put on]
indusial  adj

indusium  (n-dz-m, -zh-)
Plural indusia
1. A thin membrane covering the sorus of a fern. The indusium often shrivels away when spores are ready to be dispersed. Also called fruitcover.
2. A cuplike structure fringed with hairs and located at the top of the style in flowers of the family Goodeniaceae (which includes the garden flowers lobelia and scaevola). Pollen is deposited into the indusium by the anthers of the same flower and, as the style grows, carried up for dispersal by pollinating insects.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.indusiumindusium - a membrane enclosing and protecting the developing spores especially that covering the sori of a fern
covering, natural covering, cover - a natural object that covers or envelops; "under a covering of dust"; "the fox was flushed from its cover"
sorus - cluster of sporangia usually on underside of a fern frond


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