Definify.com

Webster 1913 Edition

Noun.

The quality or state of being sensitive; – used chiefly in science and the arts;

as, the

sensitivity

of iodized silver

Sensitivity

and emotivity have also been used as the scientific term for the capacity of feeling.

Hickok.

sensitivity ‎(plural sensitivities)

The quality of being sensitive.
The ability of an organism or organ to respond to external stimuli.
- 2013 July-August, Fenella Saunders, “Tiny Lenses See the Big Picture”, in American Scientist:
  The single-imaging optic of the mammalian eye offers some distinct visual advantages. Such lenses can take in photons from a wide range of angles, increasing light sensitivity. They also have high spatial resolution, resolving incoming images in minute detail.
(statistics) The proportion of individuals in a population that will be correctly identified in a binary classification test.
(electronics) The degree of response of an instrument to a change in an input signal.
(photography) The degree of response of a film etc. to light of a specified wavelength.

the quality of being sensitive

the ability of an organism or organ to respond to external stimuli

the proportion of positive individuals in a population that will be correctly identified in a binary test

the degree of response of an instrument to a change in an input signal

the degree of response of a film etc. to light of a specified wavelength