noun
outer thigh
Refers to the lateral part of the thigh, from hip to knee. Common in anatomy, sports, and everyday contexts.
外股の筋肉を鍛えるストレッチを教えてください。
Please teach me a stretch to train the outer thigh muscles.
転んで外股を強く打った。
I fell and hit my outer thigh hard.
Compound of 外 (そと, 'outside') and 股 (もも, 'thigh'). The spelling 外腿 uses 腿, another character for 'thigh'.