sub-

pref. 在...下；在...中

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-).；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.