(pharmacology) a book containing a compilation of pharmaceutical products with their formulas and methods of preparation; "postexposure prophylaxis is an integral part of the pharmacopeia in preventing severe disease after acute infections"
a function word that combines with a noun or pronoun or noun phrase to form a prepositional phrase that can have an adverbial or adjectival relation to some other word
(linguistics) the placing of one linguistic element before another (as placing a modifier before the word it modifies in a sentence or placing an affix before the base to which it is attached)