lon·gi·tu·di·nal /ˌlɒndʒɪˈtjuːdɪnəl◂ $ ˌlɑːndʒɪˈtuː-/ adjectiveadj technical 1 PERIOD OF TIMErelating to the development of something over a period of time 纵观的longitudinal study/survey/research etc a longitudinal study of unemployed workers 对失业工人的纵观研究
2 LONGgoing from top to bottom, not across 纵长的,纵向的 longitudinal stripes 竖直条纹
—longitudinally adverbadv