tri·so·my (trī-sōmē, trīsō-)
n. pl. tri·so·mies
The condition of having three copies of a given chromosome in each somatic cell rather than the normal number of two.

[TahlilGaran] American Dictionary ▲

trisomy
[tri- + -som(e)³ + -y².]

[TahlilGaran] American Dictionary ▲

trisomy
trisome n.
tri·somic adj.

[TahlilGaran] American Dictionary ▲

trisomy 13
n.
The condition of having three copies of chromosome 13 that results in a syndrome characterized by mental retardation and defects to the central nervous system and heart.

[TahlilGaran] American Dictionary ▲

trisomy 21
n.
See Down syndrome.

[TahlilGaran] American Dictionary ▲