-ploid

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-ploid

suff.
Having a number of chromosomes that has a specified relationship to, or is a multiple of, the basic number of chromosomes of a group: heteroploid.

[From diploid and haploid.]
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.

-ploid

adj combining form, n combining form
(Biology) indicating a specific multiple of a single set of chromosomes: diploid.
[from Greek -pl(oos) -fold + -oid]
-ploidy n combining form
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

-ploid

a combining form meaning “having chromosome sets” of the kind or number specified by the initial element: hexaploid.
[extracted from haploid]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.