sub-
 (adj.)次


 sub- 前綴
 在下麵,亞,不足,副


 sub
 零減法指令


 sub
 次 副 子


 Sub-
 1. A prefix signifying under, below, beneath, and hence often, in an inferior position or degree, in an imperfect or partial state, as in subscribe, substruct, subserve, subject, subordinate, subacid, subastringent, subgranular, suborn. Sub- in Latin compounds often becomes sum- before m, sur before r, and regularly becomes suc-, suf-, sug-, and sup- before c, f, g, and p respectively. Before c, p, and t it sometimes takes form sus- (by the dropping of b from a collateral form, subs-).
 2. Chem. A prefix denoting that the ingredient (of a compound) signified by the term to which it is prefixed,is present in only a small proportion, or less than the normal amount; as, subsulphide, suboxide, etc.  Prefixed to the name of a salt it is equivalent to basic; as, subacetate or basic acetate. [Obsoles.]

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 sub
      n 1: a large sandwich made of a long crusty roll split lengthwise
           and filled with meats and cheese (and tomato and onion
           and lettuce and condiments); different names are used in
           different sections of the United States [syn: bomber,
           grinder, hero, hero sandwich, hoagie, hoagy, {Cuban
           sandwich, Italian sandwich, poor boy, submarine,
           submarine sandwich, torpedo, wedge, zep]
      2: a submersible warship usually armed with torpedoes [syn: submarine,
          pigboat, U-boat]
      v : be a substitute; "The young teacher had to substitute for
          the sick colleague"; "The skim milk substitutes for
          cream--we are on a strict diet" [syn: substitute, {stand
          in, fill in]
      [also: subbing, subbed]