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Splitting or opening along a circumference, with the top coming off as a lid: a circumscissile seed capsule.
[circum- + Latin scissilis, easily split, splitting; see scissile.]
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 the dry dehiscent fruits of certain plants) opening completely by a transverse split
[C19: from circum- + Latin scissilis capable of splitting, from scindere to split]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
cir•cum•scis•sile(ˌsɜr kəmˈsɪs ɪl)
opening along a transverse circular line, as a seed vessel.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.