(genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)
reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
例句
Characterized by, involving, or causing miosis. 缩瞳的以缩瞳为特征的，与其有关的或能导致缩瞳的
Results indicate that optimum ultrastructural observation can be achieved with the peotoplasts in miosis phase. 包括细胞核在内的许多细胞器都可观察到。
Signs include enophthalmos (sunken eye), miosis (small pupil), elevated third eyelid, and ptosis (drooping of the upper eyelid). 症状包括眼球内陷、瞳孔缩小、第三眼睑上移和上眼睑下垂。
This review is focused on the recent research progresses of related genes in the development of embryo, endosperm, and miosis, and several genes may involved in the regulation of apomitic development. 本文介绍了植物胚发育、胚乳发育、减数分裂等涉及无融合生殖过程的相关基因的研究进展，同时介绍了可能与植物无融合生殖途径调控相关的几个基因片段的研究情况。
