'Nostoc' definitions:
Definition of 'nostoc'
From: WordNet
noun
Found in moist places as rounded jellylike colonies
Definition of 'Nostoc'
From: GCIDE
- Nostoc \Nos"toc\, prop. n. [F.] (Bot.) A genus of algae. The plants are composed of moniliform cells imbedded in a gelatinous substance. [1913 Webster]
- Note: 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. [1913 Webster]