英语词汇“chiasma”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

chi•as•ma n., pl. -mas, -ma•ta

Anatomya crossing or decussation, as that of the optic nerves at the base of the brain.
[Cell Biol.]a point of overlap of paired chromatids at which fusion and exchange of genetic material take place during prophase of meiosis.

Also, chi•asm

Greek: crosspiece of wood, cross-bandage, equivalent. to chi chi¹ + -asma noun, nominal suffix
1830–40;

chi•as′mal, chi•as′mic, chi•as•mat•ic adj.

Collins Concise English Dictionary © HarperCollins Publishers::

chiasma /kaɪˈæzmə/ n ( pl -mas, -mata / -mətə/, -asms)

the cross-shaped connection produced by the crossing over of pairing chromosomes during meiosis
the crossing over of two parts or structures, such as the fibres of the optic nerves in the brain

Etymology: 19th Century: from Greek khiasma wooden crosspiece, from khiazein to mark with an X, from khi chi¹

单词	chiasma
释义	WordReference Random House Unabridged Dictionary of American English © 2024 chi•as•ma (kī az′mə),USA pronunciation n., pl. -mas, -ma•ta (-mə tə).USA pronunciation Anatomya crossing or decussation, as that of the optic nerves at the base of the brain. [Cell Biol.]a point of overlap of paired chromatids at which fusion and exchange of genetic material take place during prophase of meiosis. `Also, chi•asm` (kī′az əm).USA pronunciation Greek: crosspiece of wood, cross-bandage, equivalent. to chi chi¹ + -asma noun, nominal suffix 1830–40; chi•as′mal, chi•as′mic, chi•as•mat•ic (kī′az mat′ik),USA pronunciation adj. Collins Concise English Dictionary © HarperCollins Publishers:: chiasma /kaɪˈæzmə/ n ( pl -mas, -mata / -mətə/, -asms) the cross-shaped connection produced by the crossing over of pairing chromosomes during meiosis the crossing over of two parts or structures, such as the fibres of the optic nerves in the brain Etymology: 19th Century: from Greek khiasma wooden crosspiece, from khiazein to mark with an X, from khi chi¹
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