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Overlapping at the base to form a flat, fanlike arrangement in two ranks, as the leaves of some irises.
[Latin equitāns, equitant-, present participle of equitāre, to ride horseback, from eques, equit-, horseman, from equus, horse; see ekwo- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Botany) (of a leaf) having the base folded around the stem so that it overlaps the leaf above and opposite
[C19: from Latin equitāns riding, from equitāre to ride, from equus horse]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014