vergencen.
英 'vɜːdʒ(ə)ns | 美 'vɚrdʒəns
中文n. 趋异；[化学] 聚散度，朝向
词根词源
vergence (n.)1902 in ophthalmology, from verge (v.) + -ence. From 1660s as "fact or condition of being inclined" (toward something). Related: Vergency.
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