annulation

名词 n.
中文释义

英文释义

名词 n.
  1. The formation of a ring
  2. Any reaction that forms a ring of atoms
  3. Any structure in the form of a ring

词形变化

annulations plural

词汇关系

衍生词
benzannulation benzoannulation cyclobutannulation cycloheptannulation cyclohexannulation cyclooctannulation cyclopentannulation cyclopropannulation photoannulation transannulation

词源

Etymology tree
Proto-Indo-European *h₁eh₂nosder.
Proto-Italic *ānos
Latin ānus
Proto-Indo-European *-lós
Proto-Indo-European *-elós
Proto-Italic *-elos
Latin -ulus
Latin ānulus
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-tós
Proto-Indo-European *-eh₂tos
Proto-Italic *-ātos
Latin -ātus
Latin ānulātus
Latin annulātus
Proto-Indo-European *-tis
Proto-Indo-European *-Hō
Proto-Indo-European *-tiHō
Proto-Italic *-tiō
Latin -tiō
Latin -ātiōlbor.
Old French -ationbor.
Middle English -acioun
English -ation
English annulation
From Latin annulātus + -ation. Compare French annulation. Piecewise doublet of annullation.
0 次浏览 数据来源: Wiktionary