Old Diseases
These have been gleaned from a variety of sources. There are no modern equivalents of some; some are the exact same medical term now as then. I've included descriptions and comments for those that aren't obvious from their modern names. If you know any Latin, some are quite obvious. In fact, modern Spanish still uses the Latin bases for most of these! There are no hard and fast times when one would have been used over another, although most folks would agree that many of these terms were still in use until the mid-20th century.
A-B C-D E-
| Old Name | Modern Name (spelling) | Description |
| ablepsy | blindness | |
| ague | (malarial) fever | a shaking fever |
| American plague | Yellow Fever | |
| Anasarca | anasarca | generalized massive edema |
| aphonia | laryngitis | |
| aphtha | "infant disease" thrush | |
| apoplexy | CVA, stroke | paralysis due to either bleeding or loss of blood flow to brain |
| asphycsia, asphicsia | asphyxia | loss of oxygen |
| atrophy | wasting away, diminishing | |
| bad blood | syphilis | |
| bilious fever | typhoid, malaria, hepatitis | |
| biliousness | jaundice | skin turns yellow |
| black plague, black death | bubonic plague | |
| black pox | small pox | with black blisters |
| black vomit | hematemesis | vomiting blood, may be ulcers or yellow fever |
| blackwater fever | dark urine associated with high fevers | |
| black fever | an acute infection with high fever, dark red skin lesions. High mortality | |
| bladder in throat | diphtheria | a membrane in back of throat |
| blood poisoning | sepsis, bacteremia | bacterial infection in blood |
| bloody flux | bloody diarrhea | |
| bloody sweat | sweating sickness | |
| bone shave | sciatica | nerve pain in hip or leg |
| brain fever | meningitis | |
| breakbone | dengue fever | |
| Bright's disease | chronic inflammatory disease of kidneys | |
| Bronze John | yellow fever | |
| bule | boil, tumor or swelling | |
| cachexy | malnutrition (cachectic) | |
| cacogastric | upset stomach | |
| cacospysy | irregular pulse | |
| caduceus | subject to falling sickness or epilepsy; symbol of medicine | |
| camp fever, camp diarrhea | typhus, typhoid | |
| canine madness | rabies | aka hydrophobia |
| canker | aphthous ulcer | ulceration of mouth/lips, may include herpes (cold sores) |
| catalepsy | seizures | "absence" seizures, trances |
| catarrhal | runny nose | |
| cerebritis | cerebritis | inflammation of cerebrum, may be due to lead poisoning |
| chilblain | chilblain | swelling of extremities due to exposure to cold |
| child bed fever | puerperal fever | postpartum infection, may be fatal |
| chin cough | pertussus, whooping cough | |
| chlorosis | iron deficiency anemia | |
| cholera | cholera | acute, severe, contagious diarrhea |
| cholera morbus | nausea, vomiting, cramps, fever. May be acute appendicitis | |
| cholecystitis | cholecystitis | inflammation of gall bladder |
| cholelithiasis | cholelithiasis | gall stones |
| chorea | chorea | characterized by convulsions, contortions and dancing |
| cold plague | ague with the chills | |
| colic | colic | abdominal pain and cramping |
| congestive chills | malaria | usually w/ diarrhea |
| congestive fever | malaria | |
| consumption | tuberculosis (TB) | |
| congestion | any fluid collection, like lungs | |
| corruption | any infection | |
| coryza | cold | |
| costiveness | constipation | |
| cramp colic | appendicitis | |
| crop sickness | overdistended stomach | |
| croup | croup | often used for laryngitis, diphtheria, strep throat |
| cyanosis | cyanosis | dark (bluish) skin from lack of oxygen |
| cynanche | diseases of the throat | |
| Day fever | only one day, sweating sickness | |
| debility | debility | lack of movement/staying in bed |