poly·ploid I. \ˈpäləˌplȯid\adjective Etymology: International Scientific Vocabulary poly- + ploid : having or being a chromosome number that is a multiple greater than two of the monoploid number < a polyploid cell > — compare allopolyploid, diploid, haploid, hexaploid • poly·ploi·dic\| ̷ ̷ ̷ ̷|plȯidik\adjective II. noun (-s) : a polyploid individual