| 释义 |
chi·as·ma
\kīˈazmə\ noun
(plural chiasma·ta \-məd.ə\ ; or chiasmas)
Etymology: New Latin, from Greek, crosspiece of wood, cross bandage, from chiazein to mark with a chi, from chi (Χ)
1. anatomy : a decussation or intersection
< the optic chiasma >
2. biology : a fusion and exchange of segments of chromatids occurring between members of a bivalent during diplotene : the source of genetic crossovers
• chi·as·mal \(ˈ)kī|azməl\ adjective
• chi·as·mat·ic \|kīəz|mad.ik, -īˌaz-\ adjective
• chi·as·mic \(ˈ)kī|azmik\ adjective |