| hamatum | <anatomy> See Unciform. Origin: NL, fr. L. Hamatus hooked. Source: Websters Dictionary (01 Mar 1998) |
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| hamaxophobia | <psychology> Rarely used term for morbid fear of, or of riding in, a vehicle. Synonym: hamaxophobia. Origin: G. Amaxa, hamaxa, a carriage, + phobos, fear (05 Mar 2000) |
| Hamburger's law | Albumins and phosphates pass from red corpuscles to serum and chlorides pass from serum to cells when blood is acid; the reverse occurs when blood is alkaline. (05 Mar 2000) |
| Hamburger's phenomenon | When CO2 enters the blood from the tissues, it passes into the red blood cell and is converted by carbonate dehydratase to bicarbonate (HCO3-); HCO3- ion passes out into the plasma while Cl- migrates into the red blood cell. Reverse changes occur in the lungs when CO2 is eliminated from the blood. Synonym: Hamburger's phenomenon. (05 Mar 2000) |
| Hamburger, Hartog | <person> Dutch physiologist, 1859-1924. See: Hamburger's law, Hamburger's phenomenon. (05 Mar 2000) |
| hame | One of the two curved pieces of wood or metal, in the harness of a draught horse, to which the traces are fastened. They are fitted upon the collar, or have pads fitting the horse's neck attached to them. Origin: Scot. Haims, hammys, hems, OE. Ham; cf. D. Haam. Source: Websters Dictionary (01 Mar 1998) |
| hamilton period | <geology> A subdivision of the Devonian system of America; so named from Hamilton, Madison Co, new York. It includes the Marcellus, Hamilton, and Genesee epochs or groups. Source: Websters Dictionary (01 Mar 1998) |
| Hamilton's pseudophlegmon | A trophic affection of the subcutaneous connective tissue, marked by a circumscribed swelling which may become indurated and red, but never suppurates. (05 Mar 2000) |
| Hamilton, Frank Hastings | <person> U.S. Surgeon, 1813-1886. See: Hamilton's pseudophlegmon. (05 Mar 2000) |
| Hamilton-Stewart formula | Formula to calculate cardiac output after intravenous indicator dye injection; blood flow in liters per minute is given by dividing the amount of injectant in milligrams by the product of the average dye concentration in the initial curve of the dye concentration sampled at a given point in the circulation and multiplied by the dose of dye (in milligrams) to write the curve from appearance to disappearance (in the absence of any recirculation). Synonym: Hamilton-Stewart formula, Stewart-Hamilton method. (05 Mar 2000) |
| Hamilton-Stewart method | Formula to calculate cardiac output after intravenous indicator dye injection; blood flow in liters per minute is given by dividing the amount of injectant in milligrams by the product of the average dye concentration in the initial curve of the dye concentration sampled at a given point in the circulation and multiplied by the dose of dye (in milligrams) to write the curve from appearance to disappearance (in the absence of any recirculation). Synonym: Hamilton-Stewart formula, Stewart-Hamilton method. (05 Mar 2000) |
| haminura | <zoology> A large edible river fish (Erythrinus macrodon) of Guiana. Source: Websters Dictionary (01 Mar 1998) |
| hamite | <paleontology> A fossil cephalopod of the genus Hamites, related to the ammonites, but having the last whorl bent into a hooklike form. Origin: L. Hamus hook. Source: Websters Dictionary (01 Mar 1998) |
| hamman sign | <radiology> Crackles heard in left lateral decubitus position, indicates (+) pneumomediastinum (12 Dec 1998) |
| Hamman's disease | <syndrome> Spontaneous mediastinal emphysema, resulting from rupture of alveoli. Synonym: Hamman's disease. (05 Mar 2000) |