a combining form meaning “having chromosome sets” of the kind or number specified by the initial element: hexaploid.

Nearby words

  1. -plastic,
  2. -plasty,
  3. -plasy,
  4. -plegia,
  5. -plex,
  6. -pnea,
  7. -pnoea,
  8. -pod,
  9. -poda,
  10. -pode

Origin of -ploid

extracted from haploid, diploid, etc.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for -ploid


adj combining form, n combining form

indicating a specific multiple of a single set of chromosomesdiploid
Derived Forms-ploidy, n combining form

Word Origin for -ploid

from Greek -pl (oos) -fold + -oid

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

Medicine definitions for -ploid



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

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.