n. Any plant of the genus Pilularia; a minute aquatic cryptogram with small pill-shaped fruit.
the GNU version of the Collaborative International Dictionary of English
n. Any plant of the genus Pilularia; minute aquatic cryptograms, with small pill-shaped fruit; -- sometimes called peppergrass.
The Century Dictionary and Cyclopedia
n. A plant of the genus Pilularia; especially, P. globulifera, the creeping pillwort of Europe: named from the pellet-like involucres containing the fruit.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. European water fern found around margins of bodies of water or in wet acid soil having small globose sporocarps