• WordNet 3.6
    • n nostoc found in moist places as rounded jellylike colonies
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Webster's Revised Unabridged Dictionary
    • prop. n Nostoc (Bot) A genus of algæ. The plants are composed of moniliform cells imbedded in a gelatinous substance.Nostoc commune is found on the ground, and is ordinarily not seen; but after a rain it swells up into a conspicuous jellylike mass, which was formerly supposed to have fallen from the sky, whence the popular names, fallen star and star jelly. Also called witches' butter.
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Century Dictionary and Cyclopedia
    • n nostoc A plant of the genus Nostoc.
    • n nostoc A genus of fresh-water algæ belonging to the Cryptophyceæ or Cyanophyceæ, the lowest group of algæ, and typical of the family Nostocaceæ and subclass Nostochineæ. They are characterized by having a gelatinous or coriaceous frond which is globose or lobed and filled with curled moniliform filaments formed of spherical or elliptical, usually colored, cells; reproduction is effected by means of heterocysts and hormogonia. They are abundant in moist places, in fresh water, or even on other-plants. From their sudden appearance after rains in summer they have been called witches-butter, fallen-stars, spittle-of-the-stars, etc. Several of the species are edible, N. edule of China being a favorite ingredient in soup.
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Chambers's Twentieth Century Dictionary
    • n Nostoc nos′tok a genus of Algæ, found in moist places
    • Nostoc Also Witches' butter, Spittle of the stars, Star-jelly, &c
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Webster's Revised Unabridged Dictionary


In literature:

In looking up the subject, myself, I have read only of greenish nostoc.
"The Book of the Damned" by Charles Fort
They are gelatinous, and have something of the appearance of Nostoc, in aspect as well as in minute structure.
"Sea-Weeds, Shells and Fossils" by Peter Gray