Definify.com
Webster 1913 Edition
Chiasma
{
Chi′asm
(kī′ăz’m)
, ‖Chi-as′ma
(kī̍-ăz′mȧ)
, } Noun.
[NL.
chiasma
, fr. Gr. χίασμα
two lines placed crosswise, fr. [GREEK] to mark with a χ.] (Anat.)
A commissure; an intersection or crossing of two tracts; especially, the optic commissure, or crucial union of the optic nerves.
– Chi-as′mal
, Adj.
Definition 2024
chiasma
chiasma
English
Alternative forms
Noun
chiasma (plural chiasmas or chiasmata)
- (anatomy) A crossing of two nerves, ligaments etc.
- (genetics, cytology) The contact point between the two chromatids of a chromosome during meiosis.
Translations
the contact point between the two chromatids of a chromosome during meiosis
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Derived terms
- optic chiasma