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Glossary of Pharmacology Terms
beginning with letter H
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habit Tweet Definition of habit Like Definition of habit on Facebook
  1. an action done on a regular basis.
It's become a of mine to have a cup of coffee after dinner.
  1. an action performed repeatedly and automatically, usually without awareness.
By force of , he dressed for work even though it was holiday.
  1. a long piece of clothing worn by monks and nuns.
It's interesting how Catholic and Buddhist monks both wear habits.
  1. a piece of clothing worn uniformly for a specific activity.
The new riding habits of the team looked smashing!.
  1. customary manner of dress.
    • 1719: w:Daniel Defoe, Daniel Defoe, w:Robinson Crusoe, Robinson Crusoe
    • : was always my fate to choose for the worse, so I did here; for having money in my pocket and good clothes upon my back, I would always go on board in the of a gentleman; and so I neither had any business in the ship, or learned to do any.
      1. an addiction.
      He has a 10-cigar .
hallucinogen Tweet Definition of hallucinogen Like Definition of hallucinogen on Facebook
  1. Any substance tending to induce hallucination
haloperidol Tweet Definition of haloperidol Like Definition of haloperidol on Facebook
  1. (pharmaceutical drug) A neuroleptic and a butyrophenone drug used in the treatment of mental illness such as psychosis.
hard Tweet Definition of hard Like Definition of hard on Facebook
  1. Resistant to pressure.
  2. Requiring a lot of effort to do or understand
a hard problem
  1. Demanding a lot of effort to endure.
a hard life
  1. (context, of a person) , severe, harsh, unfriendly, brutal.
  2. Unquestionable.
hard evidence
  1. Of drink, strong.
  2. Of water, high in dissolved calcium compounds.
  3. (context, slang, vulgar) Sexually aroused.
  4. (bodybuilding) Having muscles that are tightened as a result of intense, regular exercise.
adverb (harder, hardest)
  1. With much strength or energy
hashish Tweet Definition of hashish Like Definition of hashish on Facebook
  1. The leaves and tender parts of the Indian hemp plant (which are intoxicating), which are dried for either chewing or smoking.
    • 1855: Sir Richard Burton, Personal Narrative of a Pilgrimage to Al-Madinah and Meccah
    • :Coyly at first, but less guardedly as we grew bolder, we smoked the forbidden weed "Hashish," conversing lengthily the while about that world of which I had seen so much.
    • 1876: Louisa May Alcott, Eight Cousins
    • :You know hasheesh is the extract of hemp?
hemp Tweet Definition of hemp Like Definition of hemp on Facebook
  1. A tall annual herb, Cannabis sativa, native to Asia.
  2. Various products of this plant, including fibres and the drug cannabis.
heparin Tweet Definition of heparin Like Definition of heparin on Facebook
  1. an anticoagulant compound originally isolated from liver cells, now made synthetically for medical use
hepatic Tweet Definition of hepatic Like Definition of hepatic on Facebook
noun (plural: hepatics)
  1. Any compound that acts on the liver.
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adjective (no (compar) or (superl))
  1. Of or relating to the liver.
  2. Acting on or occurring in the liver.
  3. (colour) of a deep brownish-red color like that of liver.
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heroin Tweet Definition of heroin Like Definition of heroin on Facebook
  1. A powerful and addictive drug derived from opium producing intense euphoria classed as a narcotic in most of the world.
histamine Tweet Definition of histamine Like Definition of histamine on Facebook
  1. (biochemistry) An amine, C5H9N3, formed by decarboxylation of histidine, that causes dilatation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion; it is released during allergic reactions.
    • 2001: The intake of food triggers a release of , which activates the acid-secreting cells. " Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 46)
hormone Tweet Definition of hormone Like Definition of hormone on Facebook
  1. (physiology) Any substance, produced by one tissue and conveyed by the bloodstream to another to effect physiological activity.
  2. (pharmacology) A synthetic compound with the same activity.
  3. Any similar substance in plants.
hydrocortisone Tweet Definition of hydrocortisone Like Definition of hydrocortisone on Facebook
  1. (steroid hormone) A steroid hormone, produced by the adrenal cortex, that regulates the metabolism of carbohydrates and maintains blood pressure.
  2. (pharmaceutical drug) A synthetic version of this hormone used to treat Addison's disease and other conditions.
hyoscyamine Tweet Definition of hyoscyamine Like Definition of hyoscyamine on Facebook
  1. (chemistry) an alkaloid, the stereoisomer of atropine, used medicinally to treat abdominal pain and similar conditions
hypnotic Tweet Definition of hypnotic Like Definition of hypnotic on Facebook
  1. A person who is, or can be, hypnotized.
  2. A soporific substance.
  1. Of, or relating to hypnosis or hypnotism.
  2. inducing, Inducing sleep; soporific.
hypo Tweet Definition of hypo Like Definition of hypo on Facebook
  1. (photography) sodium thiosulfate, a photographic fixing agent.
  2. (slang) A hypoglycaemia attack in a person with diabetes.
  3. (slang) The substance sodium hyposulfite.
  4. (slang) A hypodermic syringe .
  5. (slang) hypothecation, Hypothecation.
hypodermic Tweet Definition of hypodermic Like Definition of hypodermic on Facebook
  1. A hypodermic syringe, needle or injection
  1. Of, or relating to the hypodermis, the layer beneath the dermis

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