rachischisis

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a not uncommon congenital defect in which a vertebra is malformed;
unless several vertebrae are affected or there is myelomeningocele there are few symptoms;
can be diagnosed by amniocentesis
• Syn:
spina bifida, schistorrhachis
• Hypernyms:
birth defect, congenital anomaly, congenital defect, congenital disorder, congenital abnormality