Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of crystalline is as below...

Umbelliferone :: Umbelliferone (n.) A tasteless white crystalline substance, C9H6O3, found in the bark of a certain plant (Daphne Mezereum), and also obtained by the distillation of certain gums from the Umbelliferae, as galbanum, asafetida, etc. It is analogous to coumarin. Called also hydroxy-coumarin..

Purocoll :: Purocoll (n.) A yellow crystalline substance allied to pyrrol, obtained by the distillation of gelatin..

Erythrogen :: Erythrogen (n.) A crystalline substance obtained from diseased bile, which becomes blood-red when acted on by nitric acid or ammonia..

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