noun
subject of examination; test subject
Technical term used in medical, scientific, or testing contexts for the person, animal, or sample being examined or tested.
臨床試験では、被検体の健康状態を定期的に確認する。
In clinical trials, the health status of the test subjects is checked regularly.
この検査装置は、被検体にX線を照射して内部構造を可視化する。
This inspection device visualizes the internal structure by irradiating the subject with X-rays.
検体 is a more general term for a specimen or sample taken for testing, whereas 被検体 emphasizes the entity being examined.
Compound of 被 (hi, 'receiving') + 検 (ken, 'examination') + 体 (tai, 'body'). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for technical terms.