| chaff | <plant biology> Thin, membranous scales or bracts, thin, dry unfertilized ovules among the fully developed seeds of a fruit. (21 Mar 1998) |
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| rhizome chaff | <botany> Mechanically chopped-up pieces of thin rhizomes spread on the ground and covered with soil so they can take root and form new plants. (23 Aug 1998) |
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