from the GNU version of the Collaborative International Dictionary of English
- n. a low cruciferous herb (Sisymbrium Thaliana). All these are low herbs with soft, oval, or obovate leaves, whence the name.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a small invasive self-pollinating weed with small white flowers; much studied by plant geneticists; the first higher plant whose complete genome sequence was described
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