名詞 miosis:

1. (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)
   同義詞：meiosis, reduction division
2. reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
   同義詞：light reflex, pupillary reflex, myosis

miosis 也作 my.o.sis

n.（名詞）
【復數(shù)】 mi.o..ses[-sôz]
Constriction of the pupil of the eye, resulting from a normal response to an increase in light or caused by certain drugs or pathological conditions.
縮瞳：眼睛瞳孔的縮小，是對光線增強的正常反應結果或由某些藥物或病理學情況而引起

來源：
Greek muein [to close the eyes]
希臘語 muein [閉上眼睛]
-osis
-osis