noun
test piece; test object; specimen
Technical term used in engineering, materials testing, and scientific contexts for a physical object subjected to testing.
この試験体は引張試験に使われます。
This test piece is used for tensile testing.
試験体の寸法を正確に測定してください。
Please measure the dimensions of the specimen accurately.
試料 also means sample or specimen, but is more common in chemical analysis and laboratory settings; 試験体 emphasizes the object's role in a mechanical or physical test.
Compound of 試験 (test) and 体 (body, object). The reading is the standard on'yomi combination.