plural susceptibilities
Definition of susceptibility
1
: the quality or state of being susceptible
especially
: lack of ability to resist some extraneous agent (such as a pathogen or drug) : sensitivity
2a
: a susceptible temperament or constitution
3a
: the ratio of the magnetization in a substance to the corresponding magnetizing force
b
: the ratio of the electric polarization to the electric intensity in a polarized dielectric
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Merriam-Webster unabridged
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Time Traveler for susceptibility
The first known use of susceptibility was in 1644
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