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Of or relating to a flower that is pollinated after it opens.
[Greek khasma, an opening + -gamous.]
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) botany the production of flowers that open, so as to expose the reproductive organs and allow cross-pollination. Compare cleistogamy
[C20: from New Latin (flores) chasmogami from Greek khasma chasm + -gamy]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014