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单词 sub-
释义 sub-
  1. a prefix occurring originally in loanwords from Latin (subject; subtract; subvert; subsidy); on this model, freely attached to elements of any origin and used with the meaning "under," "below," "beneath" (subalpine; substratum), "slightly," "imperfectly," "nearly" (subcolumnar; subtropical), "secondary," "subordinate" (subcommittee; subplot).
  2.  Chem.  
   a. a prefix indicating a basic compound: subacetate; subcarbonate; subnitrate.
   b. a prefix indicating that the element is present in a relatively small proportion, i.e., in a low oxidation state: subchloride; suboxide.
 Also, su-, suc-, suf-, sug-, sum-, sup-, sur-, sus-.
 [ < L, comb. form repr. sub (prep.); akin to Gk hypó; see HYPO-]
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更新时间:2024/9/22 10:34:09