noso-, nos-, nosero-, noser-, -nosia, -nosis, -noses, -nosus, nosema- +

(Greek: disease, sickness)

nosologist
A specialist in the classification of diseases.
nosology
1. The science of the classification of diseases.
2. The study of diseases and, in particular, their classification, grouping, ordering, and relationship to one another; it includes the formulation of principles for differentiating one disease from another.
3. The classification of ill people into groups, whatever the criteria for the classification, and agreement as to the boundaries of the group.

Pointing to a page about human diseases or nosology. When diseases started to become plagues is explained at this nosology page.

nosomania
1. An obsession with imagined disease; such as, hypochondriacism or hypochondriasis.
2. An unfounded morbid belief that one is suffering from some special disease.
nosomathete
A student of diseases.
nosometry
1. The quantification of the amount of disease in a population.
2. Measurement of morbidity or of the sickness rate in certain occupations and social conditions.
3. The calculation of morbidity rates.
nosomycosis
Any fungal disease or infection.
nosonomy
The naming of diseases; especially, by classifications.
nosoparasite
1. An organism associated with a particular disease and able to modify its coarse, but not serving as the actual causal agent; or to put it another way: a microorganism found in conjunction with a disease process that, while capable of modifying the course of the disease, is not its cause.
2. A pathogenic parasite that attacks only already diseased tissues.
nosophile (s) (noun), nosophiles (pl)
A person who is morbidly attracted by sickness or disease: Jane read a story about a ghoulish kind of girl who was drawn towards those who had illnesses and ailments, and she was termed to be a nosophile.
nosophilia
An abnormal or morbid desire to be ill.
nosophyte
1. Any pathogenic vegetable organism.
2. A plant microorganism that can give rise to pathologic conditions in humans or other hosts.
nosopoietic
Causing or producing disease.
nosotaxy
1. The classification of diseases.
2. The arrangement of disease nomenclatures.
nosotherapy
1. The medical treatment of a disease.
2. The use of one disease to treat another; such as, malaria-induced fever for the treatment of central nervous system syphilis.
nosotoxic
Producing nosotoxicosis.