You've confused Latin with Greek. You're thinking of dens (stem dent-), tooth in Latin. This word here is Greek: dendron (stem dendr-), and it means tree.

Some CERT folks know the classical languages -- otherwise whom will you rely on when you come across a warning like "liberate tutamet ex inferis"? (Extra points for those who can identify the right movie. Incidentally, the script misspelled one Latin word.)