As nouns the difference between pharmacognosy and photochemistry
is that pharmacognosy is a branch of pharmacology that studies medical substances that are derived from natural sources, and their recognition while photochemistry is (chemistry) the study of photochemical reactions.
pharmacognosy
English
Noun
(
wikipedia pharmacognosy)
(
pharmacognosies)
A branch of pharmacology that studies medical substances that are derived from natural sources, and their recognition.