from The Century Dictionary.
- noun A chromosome that forms the distinctive characteristic between the male-producing and female-producing spermatozoa in certain insects (Hemiptera and Coleoptera). The idiochromosomes, which areusually smaller in the male-producing than in the female-producing forms, are supposed to be definitely correlated with the sexual characters.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun cytology A
from Wiktionary, Creative Commons Attribution/Share-Alike License
From idio- + chromosome.
Montgomery the 'hetero-chromosome,' while the names 'heterotropic chromosome' and idiochromosome have also been used.