吸きゅう光こう度ど

noun

absorbance; optical density

Technical term in physics and chemistry for the logarithm of the ratio of incident to transmitted radiant power through a sample. 'Extinction' is an older synonym.

• この溶よう液えきの吸きゅう光こう度どを分ぶん光こう光こう度ど計けいで測そく定ていした。

  The absorbance of this solution was measured with a spectrophotometer.