The presence of three copies, instead of the normal two, of a particular chromosome of an organism.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: biology, cytology, medicine, natural-sciences, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: chromosomal aberration, chromosomal anomaly, chrosomal abnormality, chromosonal disorder
Narrower terms: mongolism, mongolianism, Down's syndrome, Down syndrome, trisomy 21