Quiz: Remember the definition of mal de mer?

trisomy 13

noun, Pathology
a syndrome associated with the presence of an extra chromosome 13, characterized by mental retardation, cardiac problems, and multiple deformities.
Also called trisomy 13 syndrome. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Encyclopedia Article for trisomy 13 syndrome

trisomy 13

human chromosomal disorder that results from an extra (third) copy of chromosome 13. Infants born with this disorder have profound mental retardation and severe developmental malformations that include a small head, a cleft palate and lip, tiny eyes and eye openings, extra digits on hands and feet (polydactyly), clenched fingers, central nervous system abnormalities, and defects in many internal organs. There is no cure for this disorder, and most infants die in the first few months of life. The only treatment is general supportive care. Trisomy 13 is quite rare, occurring in only one out of 20,000 live births. Its incidence increases in the offspring of women and men over the age of 32.

Learn more about trisomy 13 with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for trisomy 13

Few English speakers likely know this word

Word Value for trisomy

Scrabble Words With Friends