Pharmacopoeia (noun): a book containing a compilation of pharmaceutical products with their formulas and methods of preparation

The word derives from Ancient Greek φαρμακοποιΐα (pharmakopoiia), from φαρμακο- (pharmako-) 'drug', followed by the verb-stem ποι- (poi-) 'make' and finally the abstract noun ending -ια (-ia). These three elements together can be rendered as 'drug-mak-ing'.

In Latin, the Greek spellings φ (f), κ (k) and οι (oi) are respectively written as ph, c and œ, giving the spelling pharmacopœia. In UK English, the Latin œ is rendered as oe, giving us the spelling pharmacopoeia, while in American English oe becomes e, giving us the spelling pharmacopeia.