Definition of chiasma
chiasmata
play \kī-ˈaz-mə-tə, kē-\1 : an anatomical intersection or decussation — compare optic chiasma
2 : a cross-shaped configuration of paired chromatids visible in the diplotene stage of meiotic prophase and considered the cytological equivalent of genetic crossing-over
From the M-W Editors
Origin and Etymology of chiasma
New Latin, X-shaped configuration, from Greek, crosspiece, from chiazein to mark with a chi, from chi (x)
First Known Use: 1839
Medical Dictionary
chiasma
playMedical Definition of chiasma
chiasmata
\-mət-ə\play1: an anatomical intersection or decussation—see optic chiasma
2: a cross-shaped configuration of paired chromatids visible in the diplotene of meiotic prophase and considered the cytological equivalent of genetic crossing-over
Learn More about chiasma
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See words that rhyme with chiasma Britannica.com: Encyclopedia article about chiasma
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