I actually started a master glossary once upon a time (one of my many, many unfinished projects.)
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Mega work in progress, but essentially I went to every major glossary for cannabis that I could find, put EVERY SINGLE LIST into one master list, then started sorted.
It needs duplicate entries deleted, possibly better/more clear pictures defined, and pictures would be nice, but it's a start at the least:
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It won't be nearly as big once it's cleaned up a bit, but it has over 600+ entries in it and could easily be one of the largest/most complete glossaries available if it had a little tender love and care.