precursor

名词 n. 形容词 adj.
中文释义
英 /pɹɪˈkɜː.sə/|/ˈpɹiːˌkɜː.sə/    美 /pɹɪˈkɜː.sə/|/ˈpɹiːˌkɜː.sə/|/pɹɪˈkɜɹ.səɹ/|/ˈpɹiˌkɜɹ.səɹ/

英文释义

名词 n.
  1. That which precurses: a forerunner, predecessor, or indicator of approaching events.
    — Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.
  2. One of the compounds that participates in the chemical reaction that produces another compound.
形容词 adj.
  1. Caused by the following symbol. not-comparable

词形变化

precursors plural præcursor alternative

词汇关系

近义词
antecedent beforemath foremath precedent precursor progenitor
反义词
aftermath consecution derivative follower sequel
下位词
front matter predecessor
衍生词
bioprecursor cardioprecursor myoprecursor nanoprecursor neuroprecursor nonprecursor oligoprecursor osteoprecursor precursor enzyme precursorial precursorship precursor tip precursory
相关词
cursor

词源

词源 1
Inherited from Middle English precursour, from Middle French precurseur or its etymon Latin praecursor (“forerunner”). By surface analysis, precurse + -or.
词源 2
Etymology tree
Proto-Indo-European *per-
Proto-Indo-European *preh₂-
Proto-Indo-European *-i
Proto-Indo-European *préh₂i?
Proto-Italic *prai
Proto-Italic *prai-
Latin prae-lbor.
Middle English pre-
English pre-
English cursor
English precursor
From pre- + cursor.
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