Wiktionary
n. (context biology genetics English) The branch of genetics that studies the relationships between the structure and number of chromosomes as seen in isolated cells and variation in genotype and phenotype
WordNet
n. the branch of biology that studies the cellular aspects of heredity (especially the chromosomes)
Wikipedia
Cytogenetics is a branch of genetics that is concerned with the study of the structure and function of the cell, especially the chromosomes. It includes routine analysis of G-banded chromosomes, other cytogenetic banding techniques, as well as molecular cytogenetics such as fluorescent in situ hybridization (FISH) and comparative genomic hybridization (CGH).
Usage examples of "cytogenetics".
When he was not toiling at the cuckoo-clock factory, most of his spare time was spent either in his workshop or at the public library poring laboriously over treatises on genetics, cytology, cytogenetics, biochemistry, and any number of other subjects he did not understand-but which his subconscious absorbed very effectively indeed.