An acronym for:
- Crassulacean acid metabolism (botany), an elaborate carbon fixation pathway in plants, such as the succulents and some xerophytes
- cell adhesion molecule (cell biology)
- complementary and alternative medicine (medicine)
(botany) The CAM pathway renders plants the ability to thrive and adapt in arid environments. It was first observed by the botanists, Ranson and Thomas, in the Crassulaceae family of succulents.