| a fool or simpleton; ninny. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
trisomy tri·so·my (trī-sō'mē, trī'sō'-)
n.
The condition of having three copies of a given chromosome or chromosome segment in each somatic cell rather than the normal number of two.
| trisomy (trī-sō'mē, trī'sō'-) Pronunciation Key
The condition of having three copies of a given chromosome in each body cell rather than the normal number of two. |