chiasman.
英 kaɪ'æzmə; kɪ- | 美
中文n. 交叉；视神经交叉
词根词源
chiasma (n.)"a crossing," 1832, medical Latin, from Greek khiasma "two things placed crosswise," which is related to khiasmos (see chiasmus). In cytology from 1911.
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