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Abscess, cutaneous
collection of pus under the epidermis
Abscess, dental
often caused by an untreated pulpitis that had spread beyond the alveolar bone, causing swelling and collection of pus in the adjacent soft tissues
Acne, juvenile
disorder of the hair follicles brought on by puberty, causing blackheads (pimples), pockmarks, purple scarring, or all three.
Acrocyanosis
permanent cyanosis of the hands, usually intensified by exposure to cols and humidity.
Acuminate
organ tapering to a point
Adenitis
inflammation of the lymph nodes, usually caused by a pathogen, such as a virus, bacteria, fungus, rickettsia, or protozoan. Can be local, systemic or general.
Adenoma
benign glandular tumor.
Aerophagia
abnormal swallowing of air outside of meals, causing eructation (belching).
Agitation
aberrant behavior causing excessive, chaotic motor activity.
Aggressiveness
temporary or permanent aberrant behavior causing a aggressivity and hostility toward others
Alopecia
rapid or progressive hair loss, either local or general.
Alveolitis
inflammation of the alveoli of the lungs (pneumology) or of the teeth (dentistry).
Amenorrhea
absence of menstruation.
Analgesic
causes insensitivity to pain
Angioma
Red or purple stain caused by an accumulation of blood vessels on the skin. Usually hereditary. Sometimes called""port wine stain""
Anxiety
uneasiness with vague sense of apprehension and physiological signs (epigastric pain, sense of suffocation, sweating, etc.)
Anorexia
any loss of appetite.
Anosmia
loss of the sense of smell.
Anthrax
staphylococcal cutaneous infection causing external ulcerating nodules and spreading to the subcutaneous connective tissue.
Anticatarrh
fights inflammation of the mucosa marked by profuse secretion
Antipurtrefactive
fights decomposition
Antimalaria:
fights malaria
Antineuralgic
soothes neuralgia
Antipigmentary
fights pigmentation
Antipruritic
sooth acute itching
Antispasmodic:
fights spasms
Antitussive
cough suppressant
Anti-amebic
fights intestinal diseases due to amebic substances
Antiphlogistic
counteracts inflammation
Apathy
lack of feeling or emotion.
Aphonia
loss of voice caused by a disorder of the vocal cords (such as laryngitis) or by recurrent nerve paralysis.
Aphrodisiac
excites sexual desire
Aphta
painful, superficial ulceration of the oral or genital mucosa.
Arthritis
inflammation of the synovial membrane of a joint.
Arthritis, rheumatoid.
disease of the articular synovial membrane that eventually results in destruction; typically affects women
Arrhythmia
irregular heartbeat.
Asthenia
loss of power and strength. Origin can be nervous, psychic, physical, or sexual.
Asthma, allergic or nervous
asthmatic reaction of an allergy sufferer to inhalation of or contact with an allergen.
Astringent 
tightens pores
Arteriosclerosis
atheromatous deposits in the inner layer of the arteries
Atonic 
lacking tone, vitality, and strength
Autoimmune
relating to antibodies that attack the cells of the organism producing them
Anger
temporary, violent state resulting from a feeling of abuse.
Acne rosacea
facial flushing caused by dilatation of capillaries. Very common in women over with dry skin.
Antifungal
kills parasitic fungi
Adrenal gland
gland found near the anterior medial border of the kidney.
Antiparasitic
destroys parasites
Angioedema
chronic disease characterized by patches of cutaneous swelling involving strong itching and causing occasional bouts of fever. Also called Quincke's disease or Quincke's oedema.