powder_method
1. [ noun ] (crystallography) a process for identifying minerals or crystals; a small rod is coated with a powdered form of the substance and subjected to suitably modified X-rays; the pattern of diffracted rings is used for identification
Synonyms: powder_technique powder_photography
Related terms: photography
Similar spelling:   powder_room
  powder_magazine
  powder_and_shot
  powder_monkey
  powdery_mildew