A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.
- Spina bifida
A major birth defect and a type of neural tube defect that involves an opening in the vertebral column caused by the failure of the neural tube to close properly during embryonic development. (The neural tube is the structure in the developing embryo that gives rise to the brain and spinal cord.) Because of the […]
To recover health and strength. Also known as convalesce.
To occur again; to return. For example, a symptom, sign, or disease can recur.
The return of a sign, symptom, or disease after a remission. The reappearance of cancer cells at the same site or in another location is a form of recurrence.