| homeogenetic induction | The induction of an undifferentiated (general, all-purpose) cell to differentiate (become specialised) by a nearby cell which has already differentiated. This is most often observed in plant cells. (09 Oct 1997) |
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| homeometric | Without change in size. Origin: homeo-+ G. Metron, measure (05 Mar 2000) |
| homeomorphous | Of similar shape, but not necessarily of the same composition. Origin: homeo-+ G. Morphe, shape (05 Mar 2000) |
| homeopath | A person who practices homeopathy. (12 Dec 1998) |
| homeopathic | 1. Relating to homeopathy. Synonym: homeotherapeutic. 2. Denoting an extremely small dose of a pharmacological agent, such as might be used in homeopathy; more generally, a dose believed to be too small to produce the effect usually expected from that agent. Compare: pharmacologic, physiologic, supraphysiologic. Origin: homeo-+ G. Pathos, disease (05 Mar 2000) |
| homeopathist | A medical practitioner of homeopathy. Synonym: homeopath. (05 Mar 2000) |
| homeopathy | <medicine> The art of curing, founded on resemblances; the theory and its practice that disease is cured (tuto, cito, et jucunde) by remedies which produce on a healthy person effects similar to the symptoms of the complaint under which the patient suffers, the remedies being usually administered in minute doses. This system was founded by Dr. Samuel Hahnemann, and is opposed to allopathy, or heteropathy. Alternative forms: homoepathy. Origin: Gr. Likeness of condition or feeling; like (fr. Same; cf. Same) + to suffer: cf. F. Homeopathie. See Pathos. Source: Websters Dictionary (01 Mar 1998) |
| homeoplasia | The formation of new tissue of the same character as that already existing in the part. Synonym: homoioplasia. Origin: homeo-+ G. Plasis, a molding (05 Mar 2000) |
| homeoplastic | Relating to or characterised by homeoplasia. (05 Mar 2000) |
| homeorrhesis | The set of processes by which imbalances and other defects in ontogeny are corrected before development is completed. Synonym: ontogenic homeostasis, waddingtonian homeostasis. Origin: homeo-+ G. Rheos, stream, current (05 Mar 2000) |
| homeosis | Formation of a body part having characteristics normally found in a related or homologous part at another location in the body. Origin: homeo-+ G. -osis, condition (05 Mar 2000) |
| homeostasis | <physiology> A tendency to stability in the normal body states (internal environment) of the organism. It is achieved by a system of control mechanisms activated by negative feedback, for example a high level of carbon dioxide in extracellular fluid triggers increased pulmonary ventilation, which in turn causes a decrease in carbon dioxide concentration. Origin: Gr. Stasis = stoppage (04 Nov 1997) |
| homeostatic | Relating to homeostasis. (05 Mar 2000) |
| homeostatic equilibrium | See: homeostasis. Nitrogenous equilibrium, a condition in which the amount of nitrogen excreted from the body equals that taken in with the food; nutritive equilibrium so far as protein is concerned. Nutritive equilibrium, condition in which there is a perfect balance between intake and excretion of nutritive material, so that there is no increase or loss in weight. Synonym: physiologic equilibrium. (05 Mar 2000) |
| homeostatic lag | The interval in a homeostatic process between a change of the trait controlled and the appropriate response, due to afferent, efferent, and central components. The lag may be a pure random variable, e.g., the waiting time of an exponential process or the sum of several such processes taking any value greater than zero but with a mean considerably greater than zero; sometimes it may be deterministic or almost so and with a minimum sharply defined and greater than zero for anatomical reasons. For instance, the partial pressures of oxygen and carbon dioxide are controlled in the lungs but based on afferent information obtained from the carotid body that is already dated because of the circulation time of ten seconds or so between the two sites. (05 Mar 2000) |