1A class of biochemical compounds. In medical contexts refers to drugs (e.g., anti-inflammatory or hormone-related) and can also refer to anabolic steroids used illicitly for muscle growth.
医師は重い喘息患者にステロイドを処方した。
The doctor prescribed steroids for the severe asthma patient.
スポーツ界ではステロイドの不正使用が問題になることがある。
Illicit use of steroids is sometimes a problem in the sports world.