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Spore   Listen
noun
Spore  n.  
1.
(Bot.)
(a)
One of the minute grains in flowerless plants, which are analogous to seeds, as serving to reproduce the species. Note: Spores are produced differently in the different classes of cryptogamous plants, and as regards their nature are often so unlike that they have only their minuteness in common. The peculiar spores of diatoms (called auxospores) increase in size, and at length acquire a siliceous coating, thus becoming new diatoms of full size. Compare Macrospore, Microspore, Oospore, Resting spore, Sphaerospore, Swarmspore, Tetraspore, Zoospore, and Zygospore.
(b)
An embryo sac or embryonal vesicle in the ovules of flowering plants.
2.
(Biol.)
(a)
A minute grain or germ; a small, round or ovoid body, formed in certain organisms, and by germination giving rise to a new organism; as, the reproductive spores of bacteria, etc.
(b)
One of the parts formed by fission in certain Protozoa. See Spore formation, belw.
Spore formation.
(a)
(Biol) A mode of reproduction resembling multiple fission, common among Protozoa, in which the organism breaks up into a number of pieces, or spores, each of which eventually develops into an organism like the parent form.
(b)
The formation of reproductive cells or spores, as in the growth of bacilli.






Collaborative International Dictionary of English 0.48








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"Spore" Quotes from Famous Books



... temperature, some at a very low one and others at one as high as 125 deg. F., or more. However, most kinds of bacteria are destroyed if exposed for ten or fifteen minutes to the temperature of boiling water (212 deg. F.); but, if the bacteria are spore producers, cooking must be continued for an hour or more to insure their complete destruction. Generally speaking, in order to kill the spores the temperature must be higher than that of boiling water, or the article to be preserved must be cooked for about two hours ...
— Canned Fruit, Preserves, and Jellies: Household Methods of Preparation - U.S. Department of Agriculture Farmers' Bulletin No. 203 • Maria Parloa

... grass that covered it was coarse and of a dark green color. What causes these fairy rings? An explanation is given in a newspaper extract from "Knowledge," in which it is said: "A patch of spawn arising from a single spore or a number of spores spreads centrifugally in every direction, and forms a common circular felt, from which the fruit arises at its extreme edge; the soil in the inner part of the disc is exhausted, and the spawn dies or becomes effete there, while it spreads all around ...
— Among the Mushrooms - A Guide For Beginners • Ellen M. Dallas and Caroline A. Burgin

... that in the vast organism of an army at war the individual unit does not count. To himself he may be of prime importance and first consideration, but in the general carrying out of the scheme he is a mote, a molecule, a spore, a protoplasm—an infinitesimal, utterly inconsequential thing to be sacrificed without thought. Thus we diagnosed their mental poses. Along toward five o'clock a goodish string of cars was added to our train, and into these additional cars seven hundred French soldiers, ...
— Paths of Glory - Impressions of War Written At and Near the Front • Irvin S. Cobb

... will see on this bark are the structures which produce the reproductive bodies, these latter being known as the spores. There are two types of spores which are produced by this fungus. One is the type which is commonly spoken of as the summer spore, the other the type which is spoken of as the winter spore. The winter spore is known from the point of view of the mycologist as the perfect stage of the fungus, that is, it is the more characteristic of this particular fungus. If we should ...
— Northern Nut Growers Association Report of the Proceedings at the Second Annual Meeting - Ithaca, New York, December 14 and 15, 1911 • Northern Nut Growers Association

... cascades to the broad river beneath, its margins decked out with an infinite variety of beautiful plants. Wild bananas arched over the watercourse, and the trunks of the trees in its vicinity were clothed with ferns, large-leaved species belonging to the genus Lygodium, which, like Osmunda, have their spore-cases collected together on contracted leaves. On the 18th, we arrived at a large fazenda (plantation and cattle farm), called Jatuarana. A rocky point here projects into the stream, and as we found it impossible to stem the strong current which whirled around it, we crossed over to ...
— The Naturalist on the River Amazons • Henry Walter Bates

... other, while their delicate fronded branches and foliage lie in exquisite order, inclining outward and down the sides in rich, furred, clasping sheets overlapping and felted together until the required thickness is attained. The pedicels and spore-cases give a purplish tinge, and the whole bridge is enriched with ferns and a row of small seedling trees and currant bushes with colored leaves, every one of which seems to have been culled from the ...
— Travels in Alaska • John Muir

... similar to those of embryonic development. The only case known to me in which budding by the adult is accompanied by morphological features similar to those displayed by embryos is furnished by the budding of the medusiform spore-sacs of hydrozoon polyps. But this case is exceptional, for here we have to do with an attempt, which fails, to form a free-swimming organism, the medusa; and the vestiges which appear in the buds are the umbrella-cavity, marginal tentacles, circular canal, etc., ...
— Darwin and Modern Science • A.C. Seward and Others

... while investigating the nature of some large, transparent, spore-like elliptical cells (fungal?) whose protoplasm was rotating, while it was at the same time charged with triangular grains of starch, I observed some actinophorous rhizopods creeping about them, which had similar shaped ...
— The Dawn of Reason - or, Mental Traits in the Lower Animals • James Weir

... are living plants that grow at the expense of other plants and cause disease. Now if you can cover the leaf with a poison that will kill the spore when it comes, you can prevent the disease. One such poison is the Bordeaux (bor-do') mixture, which has proved of great value ...
— Agriculture for Beginners - Revised Edition • Charles William Burkett



Words linked to "Spore" :   aeciospore, microspore, spore mother cell, oospore, conidium, spore case, zoospore, conidiospore, macrospore, ascospore, spore sac



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