Chromosome (noun)

1. A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
2. A structure in the cell that contains genetic material in the form of DNA and protein.

Origin:

From greek words "chroma" meaning "color" and "soma" meaning "body".

Examples:

1. Humans have 46 chromosomes in each cell.
2. Chromosomes come in pairs, with one copy inherited from each parent.
3. The geneticist studied the chromosome of the plant.
4. The extra chromosome causes Down Syndrome.
5. Chromosomes are visible under a microscope during cell division.