Medical term for a disorder characterized by recurrent, severe episodes of vomiting with no apparent cause.
Cyclic vomiting syndrome is often seen especially in children.
医師は周期性嘔吐症の診断を下した。
The doctor diagnosed cyclic vomiting syndrome.
Compound of 周期性 (periodicity) + 嘔吐 (vomiting) + 症 (syndrome). The exact historical derivation is uncertain; the term is a modern medical coinage.