dragon's blood noun1 •A bright red resin, obtained from different species of a number of distinct plants Calamus rotang and genera Croton, Dracaena, Daemonorops, and Pterocarpus, used in the manufacture of varnishes, lacquers, medicines, and incenses.For black magic, assafoetida, garlic, dragon's blood, sulphur, and such-like vile-smelling concoctions were used. — 1936