extensorn.
英 ɪk'stensə; ek- | 美 ɪk'stɛnsɚ
中文n. 伸肌
词根词源
extensor (n.)"muscle which serves to straighten or extend any part of the body," 1713, short for medical Latin musculus extensor, from Late Latin extensor "stretcher," agent noun from Latin extendere "spread out, spread" (see extend).
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