尖せん部ぶMeanings1nounapex; tip; pointTechnical term for the pointed end or highest point of something, used in anatomy, botany, and geometry.葉はの尖せん部ぶが鋭するどく尖とがっている。The apex of the leaf is sharply pointed.心しん臓ぞうの尖せん部ぶは左さ下か方ほうを向むいている。The apex of the heart points downward and to the left.