Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An enclosing membrane, as that covering the sorus of a fern.
from The Century Dictionary.
- noun A layer of gray matter covering the corpus callosum in the brain: also
indusium griseum . - noun One of the embryonic envelops developed, in addition to the amnion and serosa in certain insects, such as the
- noun In Roman antiquity, one of the two tunics commonly worn by both men and women, probably the outer tunic, though some archæologists have contended that it was the inner tunic of the women.
- noun In botany:
- noun In entomology, the coat or covering of a larval insect, as the case of a caddis-worm.
- noun In anatomy, the amnion, the innermost membrane enveloping the fetus.
from the GNU version of the Collaborative International Dictionary of English.
- noun A collection of hairs united so as to form a sort of cup, and inclosing the stigma of a flower.
- noun 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.
- noun A peculiar covering found in certain fungi.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A protecting
membrane , especially that covering the developingspores of afern
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a membrane enclosing and protecting the developing spores especially that covering the sori of a fern
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Sori (singular _sorus_, a heap), or fruit dots may be naked as in the polypody, but are usually covered with a thin, delicate membrane, known as the indusium (Greek, a dress, or mantle).
The Fern Lover's Companion A Guide for the Northeastern States and Canada George Henry Tilton
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That the indusium is a _special_ organ, i.e. not an eruption of the cuticle, I am sure; hence it is essential to examine extensively both indusiate and other forms, the precise extension of their veins, etc. at an early period to ascertain if their most diversified situations cannot be reduced to some one type.
Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries William Griffith
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When followed backward the dentate gyrus separates from the fimbria at the splenium, loses its incisions and knobs, and as the fasciola cinerea passes over the splenium onto the dorsal surface of the corpus callosum and spreads out into a thin layer of gray substance known as the indusium, which can be traced forward around the genu of the corpus callosum into the gyrus subcallosus.
IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves 1918
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Sporangia borne on an elevated, globular receptacle in a membranous, cup-shaped indusium which is open at the top.
The Fern Lover's Companion A Guide for the Northeastern States and Canada George Henry Tilton
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Ovarium uniovulatum; stylus inflexus; stigmatis indusium ore nudum; semen in nuce solitarium.
Journal of an Expedition into the Interior of Tropical Australia 2003
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SERICEA, quite simple or scarcely at all lobed, and a hairy indusium. 24 The tree, still a nondescript, although the fruit had been gathered by me in 1831, and then sent to Mr. Brown, was also here; and I saw one or two trees of a species of
Journal of an Expedition into the Interior of Tropical Australia 2003
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These sori are of different shape in different genera, and are usually protected by a delicate membranous covering (indusium).
Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Douglas Houghton Campbell
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The beech ferns are often classed with the polypodies, because, like them, they have no indusium; but in other ways they are more akin to the wood ferns.
The Fern Lover's Companion A Guide for the Northeastern States and Canada George Henry Tilton
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The wood ferns, on the other hand, have a kidney-shaped indusium attached to the fronds by the sinus.
The Fern Lover's Companion A Guide for the Northeastern States and Canada George Henry Tilton
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I will bear this in mind, as certain forms of Pteris or its affinities lead me to suspect that in these tribes the indusium may be a long way from the margin, and yet be, quoad origin, marginal; this section illustrates my meaning.
Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries William Griffith
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