Susceptible is a two-gender adjective that indicates the susceptibility from someone or something. Susceptible indicates the probability of something happening and classifies a person who undergoes changes and sensations with ease.
A susceptible person is a person "subject to" or "prone to". This word is often linked to the ease with which a person contracts a disease. Ex: His health has always been very fragile, he is very susceptible to illnesses.
In the context of epidemiology, a virus tries to find a host where it can replicate and defeat the organism's defenses. This host can be susceptible or resistant, whereas a susceptible host does not show resistance to this pathogen and can contract the disease.
Figuratively speaking, a susceptible person is a touchy person who is offended by anything.
There are some doubts regarding the spelling of this word, more specifically the question between susceptible and susceptible. Susceptible is the written form used in Portuguese from Portugal, however, the new orthographic agreement indicates that susceptible is the correct form of writing the word.
magnetic susceptibility
Magnetic susceptibility is the quantity that measures the magnetization capacity of bodies. Formally defined as the ratio between the magnetic polarization induced on a body and the intensity of the magnetic field that causes it.
electrical susceptibility
Electrical susceptibility is the quantity that measures the electrical polarization capacity of matter. Formally defined as the ratio between the dielectric polarization that occurs in a substance and the intensity of the external electric field necessary for it.