trisomy

Noun trisomy has 1 sense

• trisomy(n = noun.state) - chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell;
has particulars: down's syndrome, down syndrome, mongolianism, mongolism, trisomy 21
is a kind of chromosomal aberration, chromosomal anomaly, chromosonal disorder, chrosomal abnormality