'densitometry' definitions:

Definition of 'densitometry'

From: WordNet
noun
Measuring the optical density of a substance by shining light on it and measuring its transmission

Definition of 'densitometry'

From: GCIDE
  • densitometry \densitometry\ n. measuring the optical density of a substance by shining light through it and measuring the intensity of the transmitted light. [WordNet 1.5]