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Puffball :: Puffball (n.) A kind of ball-shaped fungus (Lycoperdon giganteum, and other species of the same genus) full of dustlike spores when ripe; -- called also bullfist, bullfice, puckfist, puff, and puffin..

Tetraspore :: Tetraspore (n.) A nonsexual spore, one of a group of four regularly occurring in red seaweeds..

Oophore :: Oophore (n.) An alternately produced form of certain cryptogamous plants, as ferns, mosses, and the like, which bears antheridia and archegonia, and so has sexual fructification, as contrasted with the sporophore, which is nonsexual, but produces spores in countless number. In ferns the oophore is a minute prothallus; in mosses it is the leafy plant..

Uredospore :: Uredospore (n.) The thin-walled summer spore which is produced during the so-called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heter/cious, etc..

Calyptra :: Calyptra (n.) A little hood or veil, resembling an extinguisher in form and position, covering each of the small flasklike capsules which contain the spores of mosses; also, any similar covering body..

Cryptogamia :: Cryptogamia (n.) The series or division of flowerless plants, or those never having true stamens and pistils, but propagated by spores of various kinds..

Ovum :: Ovum (n.) A more or less spherical and transparent mass of granular protoplasm, which by a process of multiplication and growth develops into a mass of cells, constituting a new individual like the parent; an egg, spore, germ, or germ cell. See Illust. of Mycropyle..

Bacterium :: Bacterium (n.) A microscopic vegetable organism, belonging to the class Algae, usually in the form of a jointed rodlike filament, and found in putrefying organic infusions. Bacteria are destitute of chlorophyll, and are the smallest of microscopic organisms. They are very widely diffused in nature, and multiply with marvelous rapidity, both by fission and by spores. Certain species are active agents in fermentation, while others appear to be the cause of certain infectious diseases. See Bacillus

Zonate :: Zonate (a.) Divided by parallel planes; as, zonate tetraspores, found in certain red algae..

Swarmspore :: Swarmspore (n.) One of innumerable minute, motile, reproductive bodies, produced asexually by certain algae and fungi; a zoospore..

Moss :: Moss (n.) A cryptogamous plant of a cellular structure, with distinct stem and simple leaves. The fruit is a small capsule usually opening by an apical lid, and so discharging the spores. There are many species, collectively termed Musci, growing on the earth, on rocks, and trunks of trees, etc., and a few in running water..

Zoosporic :: Zoosporic (a.) Of or pertaining to zoospores; of the nature of zoospores.

Fructification :: Fructification (n.) The collective organs by which a plant produces its fruit, or seeds, or reproductive spores..

Theca :: Theca (n.) A sheath; a case; as, the theca, or cell, of an anther; the theca, or spore case, of a fungus; the theca of the spinal cord..

Zoospore :: Zoospore (n.) See Swarmspore.

Basidium :: Basidium (n.) A special oblong or pyriform cell, with slender branches, which bears the spores in that division of fungi called Basidiomycetes, of which the common mushroom is an example..

Oospore :: Oospore (n.) A fertilized oosphere in the ovule of a flowering plant.

Zygospore :: Zygospore (n.) A spore formed by the union of several zoospores; -- called also zygozoospore.

Conjugation :: Conjugation (n.) A kind of sexual union; -- applied to a blending of the contents of two or more cells or individuals in some plants and lower animals, by which new spores or germs are developed..

Motile :: Motile (a.) Having powers of self-motion, though unconscious; as, the motile spores of certain seaweeds..

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