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quillwort

[kwil-wurt, -wawrt] /ˈkwɪlˌwɜrt, -ˌwɔrt/
noun
1.
any fernlike, aquatic marsh plant of the genus Isoëtes, characterized by clustered, quill-like leaves bearing sporangia in their bases.
Origin of quillwort
1780-1790
1780-90; quill + wort2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for quill wort

quillwort

/ˈkwɪlˌwɜːt/
noun
1.
any aquatic tracheophyte plant of the genus Isoetes, with quill-like leaves at the bases of which are spore-producing structures: family Isoetaceae, phylum Lycopodophyta (club mosses, etc)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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14
17
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