Lexic.us

Definition of Chiasma

1. Noun. An intersection or crossing of two tracts in the form of the letter X.

Definition of Chiasma

1. Noun. (anatomy) A crossing of two nerves, ligaments etc. ¹

2. Noun. (genetics cytology) The contact point between the two chromatids of a chromosome during meiosis. ¹

¹ Source: wiktionary.com

Definition of Chiasma

1. an anatomical junction [n -MATA or -MAS] : CHIASMAL, CHIASMIC [adj]

Medical Definition of Chiasma

1. Junction points between nonsister chromatids at the first diplotene of meiosis, the consequence of a crossing over event between maternal and paternally derived chromatids. A chiasma also serves a mechanical function and is essential for normal equatorial alignment at meiotic metaphase I in many species. Frequency of chiasmata is very variable between species. (05 Jan 1998)

Lexicographical Neighbors of Chiasma

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