THCM

THCM stands for Tetrahydrocannabinol-Methoxy or, more accurately, THC Methyl Ether (THC-MeO). It is referred to as Methoxy because it has an additional Methyl group in its chemical composition.

Other cannabinoids such as Delta-8, Delta-9, Delta-10, etc., get their name from where the double bond is located in their carbon atom. Delta-8 has a double bond in the 8th carbon, Delta-9 in the 9th carbon, Delta-10 in the 10th carbon, and so on. 

THCM doesn’t have a unique double bond number. Instead, it has an oxygen atom connected to a carbon atom. So, there could be other versions in D8, D9, or D10.