| Abdomen | |
| Abdominal | See Abdomen. |
| Abdominal Hernia | An abdominal hernia occurs when there is an area where the muscles are weak, and this allows the internal organs to bulge through the abdominal wall. Signs include a lump (soft bulge of tissue) or a small, localized swelling on the abdomen. |
| Abortifacient | |
| Abscess | See Boil. |
| Abscesses | See Boil. |
| Acetylcholine | |
| Acetylcholinesterase | Neurotransmitter enzyme that hydrolyzes acetylcholine, affecting functioning of the parasympathetic nervous system. |
| Achlorhydria | |
| Acidophilus | |
| Acidosis | |
| Acinus | A small sac-like dilatation. |
| Acne | |
| Actinic Keratoses | |
| Acute | An illness or symptom of sudden onset, which generally has a short duration. |
| Adaptogen | |
| Addison's Disease | |
| Adenitis | An inflammation of one or several lymph nodes, or related lymphoid tissues. |
| Adenoma | |
| Adenopathy | |
| Adenosine Diphosphate | |
| Adenosine Monophosphate | |
| Adenosine Triphosphate | |
| Adjuvant | A substance added to a drug that affects the action of the active ingredient in a predictable way. |
| Adnexitis | Inflammation of organ appendages, typically referring to the fallopian tube. |
| ADP | See Adenosine Diphosphate. |
| Adrenal | |
| Adrenal Cortex | |
| Adrenal Exhaustion | See Adrenal Insufficiency. |
| Adrenal Gland | See Adrenal. |
| Adrenal Glands | See Adrenal. |
| Adrenal Insufficiency | |
| Adrenal Medulla | |
| Adrenaline | |
| Adrenals | See Adrenal. |
| Adrenoceptors | Sites on nerve cells or fibers which react to epinephrine or norepinephrine. |
| Adsorbent | A solid substance which binds other substances to its surface but does not interact chemically with them. |
| Adsorption | The property of a solid substance to attract and hold other molecules to its surface. |
| Aerobic | |
| Aerobically | See Aerobic. |
| Age Spots | |
| Aggressive Fibromatosis | See Desmoid Tumor. |
| Agranulocytosis | Condition characterized by a marked decrease in the number of white blood cells called granulocytes. |
| AIDS | |
| Akathisia | Condition of motor restlessness that can range from a sense of inner disquiet to inability to sleep, seen in toxic reaction to neuroleptic and antipsychotic medication. |
| Albuminuria | |
| Aldosterone | |
| Alkaline | |
| Allele | Any of the alternative forms of a gene that may occur at a given position in a chromosome. |
| Alleles | See Allele. |
| Allergen | |
| Allergens | See Allergen. |
| Allergic Crease | See Allergic Salute. |
| Allergic Keratitis | Inflammation of the cornea due to allergic response. |
| Allergic Rhinitis | |
| Allergic Salute | When the itchy, runny or blocked nose is being wiped in an upwards direction. This movement helps to open up the nasal airways but can lead to an Allergic Crease - a horizontal crease or pale line that develops across the lower part of the nose as a consequence of frequent upward wiping of the nose. |
| Allergies | See Allergy. |
| Allergy | Hypersensitivity caused by exposure to a particular antigen (allergen), resulting in an increased reactivity to that antigen on subsequent exposure, sometimes with harmful immunologic consequences. |
| Allopath | See Allopathy. |
| Allopathic | See Allopathy. |
| Allopathy | Conventional medicine. Allopathy treats opposites with opposites, by using that which is the opposite of the symptom of the illness. For example, antispasmodics, fever reducers, antidepressants, etc. |
| Alopecia | |
| Alpha Carotene | A carotenoid found in carrots and certain other vegetables. Its provitamin A activity is weaker than that of beta carotene. Studies have shown that several carotenoids other than beta carotene are potent antioxidants that provide profound health benefits. Because of this, the scientific community has now recognized the importance of natural mixed carotenoids including beta carotene. |
| Alpha Tocopherol | |
| Alport Syndrome | |
| Alveolar | |
| Alveolar Soft-Part Sarcoma | |
| Alzheimer's | See Alzheimer's Disease. |
| Alzheimer's Disease | |
| Amantadine | See Amantadine Hydrochloride. |
| Amantadine Hydrochloride | |
| Amarum | Bitter vegetable drug. |
| Ameba | See Amoeba. |
| Amenorrhea | |
| Amino Acid | |
| Amino Acids | See Amino Acid. |
| Amoeba | |
| AMP | Acronym for Adenosine monophosphate. |
| Amylase | |
| Anabolic | |
| Anabolism | See Anabolic. |
| Anaemia | See Anemia. |
| Anaerobic | Of, relating to, or being activity in which the body incurs an oxygen debt (for example weight training or resistive exercises) and does not immediately burn off a lot of calories and fat. |
| Anaerobically | See Anaerobic. |
| Anal Warts | See Genital Warts. |
| Analeptic | Central nervous system stimulant. |
| Analgesic | |
| Anancastic | Pertaining to any form of repetitious stereotyped behavior that causes anxiety if prevented. |
| Anaphalactic Shock | See Anaphylactic Shock. |
| Anaphylactic | |
| Anaphylactic Shock | |
| Anaphylaxis | See Anaphylactic Shock. |
| Ancyclostoma | Parasitic hookworm in the human duodenum. |
| Ancylostoma duodenale | See Hookworm. |
| Ancylostomiasis | See Hookworm. |
| Androgen | |
| Anemia | |
| Anemias | See Anemia. |
| Anesthesia | Loss of sensation caused by neurological dysfunction or a pharmacological depression of nerve function. |
| Anesthetic | Agent causing loss of sensation by neurological dysfunction or a pharmacological depression of nerve function. |
| Aneurysm | |
| Angina | |
| Angioedema | |
| Angioneuropathy | Any neuropathy affecting primarily blood vessels as angiospasm, angioparalysis, or vasomotor paralysis. |
| Angioneurosis | Vasomotor (causing dilation or constriction of the blood vessels) nervous disease for which there is no detectable damage to nerve tissue. |
| Angiosarcoma | See Angiosarcomas. |
| Angiosarcomas | |
| Anhydrous | Water deficient. |
| Anorectic | Agent that decreases appetite. |
| Anorexia | See Anorexia Nervosa. |
| Anorexia Nervosa | |
| Anovulatory | |
| Antacid | |
| Antacids | See Antacid. |
| Antagonist | A chemical substance that interferes with the uptake, assimilation and/or physiological action of another, especially by combining with and blocking its nerve receptor. |
| Antagonists | See Antagonist. |
| Anterior | In the front or forward part of the organ or toward the head of the body. |
| Anthelmintic | |
| Anthraquinone | |
| Antiandrogenic | Substance capable of preventing full expression of the biological effects of androgenic hormones on responsive tissues, either by producing an antagonistic effect, as in the case of estrogen, or by competing for receptor sites on the cell surface. |
| Antiarrhythmic | Combating an irregular heart beat. |
| Antibodies | See Antibody. |
| Antibody | |
| Anticholinergic | Antagonistic to the cholinergic nerve fibers. |
| Anticoagulant | |
| Antidepressant | |
| Antidepressants | See Antidepressant. |
| Antiedamatous | Preventing swelling. |
| Antiemetic | Preventing vomiting. |
| Antifungal | |
| Antifungals | See Antifungal. |
| Antigen | |
| Antigenic | See Antigen. |
| Antigens | See Antigen. |
| Antigonadotropic | Agent preventing growth or function of the testes or ovary. |
| Antihistamine | |
| Antiinflammatory | See Anti-inflammatory. |
| Anti-inflammatory | |
| Antimicrobial | |
| Antimuscarinic | Inhibiting the toxic effect of muscarine or muscarine-like substances. |
| Antimycotic | Fungicidal. |
| Antioxidant | |
| Antioxidants | See Antioxidant. |
| Antiparasitic | |
| Antiphlogistic | Preventing inflammation. |
| Antiphlogistine | See Antiphlogistic. |
| Antiseptic | Inhibiting growth of infectious organisms. |
| Antisialagogue | Counteracts formation of saliva. |
| Antispasmodic | |
| Antithyrotropic | Inhibiting thyroid hormones. |
| Antitussive | |
| Antiviral | |
| Anuria | |
| Anuric | See Anuria. |
| Anxiety | |
| Aortic stenosis | Narrowing of the aortic valve of the heart. |
| Aphrodisiac | |
| Aphthous Ulcers | See Canker Sores. |
| Aplasia | Absence of tissue or defective organ development. |
| Aplastic Anemia | |
| Apnea | |
| Apocrine | |
| Apoplexy | Sudden neurologic impairment due to a cerebrovascular disorder, e.g., cerebral stroke. |
| Apoptosis | |
| Apthous Stomatitis | See Canker Sores. |
| Areola | See Nipple. |
| Arginine | |
| Arrhythmia | |
| Arrhythmias | See Arrhythmia. |
| Arrythmogenic | Causing a change in the normal rhythm of the heart. |
| Arterial | |
| Arteries | See Arterial. |
| Arteriosclerosis | |
| Artery | See Arterial. |
| Arthralgia | |
| Arthritic | See Arthritis. |
| Arthritis | |
| Arthroplasty | |
| Arthrosis | |
| Arthrosis Deformans | Noninfectious degeneration of a joint characterized by pain, cracking, and loss of bone. |
| Ascariasis | See Ascaris lumbricoides. |
| Ascarid | Large, heavy-bodied roundworms parasitic in the human intestine. |
| Ascaris lumbricoides | |
| Ascites | |
| Ascorbate | |
| Ascorbic Acid | See Vitamin C. |
| Aspartame | |
| Aspiration | |
| Asthenia | Diminishing strength and energy. |
| Asthma | |
| Asthmatic | See Asthma. |
| Astringent | Agent causing contraction, especially after topical application. |
| Asymptomatic | Not showing symptoms. |
| Ataxia | |
| Ataxic | See Ataxia. |
| Atelectasis | Incomplete lung expansion or lung collapse and airlessness. |
| Atherosclerosis | |
| Athletes Foot | See Tineas. |
| Athlete's Foot | See Tineas. |
| Atony | |
| Atopic | |
| Atopic Allergy | See Atopic. |
| ATP | See Adenosine Triphosphate. |
| Atrophic Gastritis | |
| Autoimmune | See Autoimmune Disease. |
| Autoimmune Disease | |
| Autoimmunity | See Autoimmune Disease. |
| Autologous Transfusion | A transfusion of one's own blood that has been preserved for later use. This stored personal blood is a protection against AIDS, hepatitis, and other communicable diseases. |
| Axillary | Pertaining to the region of the armpits. |
| Axillary Nodes | See Lymph Nodes. |
| Axon | |
| Ayurveda | See Ayurvedic. |
| Ayurvedic | |
| Azotemia | |
| Azotemic | See Azotemia. |