| secondary follicle | A follicle in which the oocyte attains its full size and is surrounded by an extracellular glycoprotein layer (zona pellucida) that separates it from a peripheral layer of follicular cells permeated by one or more fluid-filled antra; the theca of the follicle develops into internal and external layers. Synonym: folliculus ovaricus vesiculosus, graafian follicle, secondary follicle. (05 Mar 2000) |
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| secondary gain | Interpersonal or social advantages (e.g., assistance, attention, sympathy) gained indirectly from organic illness. Compare: primary gain. (05 Mar 2000) |
| secondary generalised epilepsy | A group of epilepsy syndromes of diverse aetiologies with diffuse or multifocal cerebral involvement. Patients typically have a variety of generalised seizure types, including tonic, atonic, myoclonic, atypical absence, and generalised tonic-clonic seizures. Partial seizures may also occur. One classic syndrome is the Lennox-Gastaut syndrome. Synonym: symptomatic epilepsy. (05 Mar 2000) |
| secondary glaucoma | Glaucoma occurring as a sequel of preexisting ocular disease or injury. (05 Mar 2000) |
| secondary haemorrhage | Haemorrhage at an interval after an injury or an operation. (05 Mar 2000) |
| secondary homonym | <zoology> Each of two or more identical species names, which, at the time of original publication, were proposed in combination with different generic names, but which, through subsequent transference, have come to bear the same combination of generic and specific names. See: homonym. (09 Jan 1998) |
| secondary host | <epidemiology> See vector. (05 Dec 1998) |
| secondary hydrocephalus | An accumulation of fluid in the cranial cavity, due to meningitis or obstruction to the venous flow. (05 Mar 2000) |
| secondary hyperparathyroidism | Hyperparathyroidism that arises as a result of disordered metabolism producing hypocalcaemia, as in chronic uraemia due to renal disease, malabsorption, rickets, or osteomalacia; associated with hyperplasia of the parathyroid glands. (05 Mar 2000) |
| secondary hypertension | Arterial hypertension produced by a known cause, e.g., hyperthyroidism, kidney disease, etc., in contrast to primary hypertension that is of unknown cause. (05 Mar 2000) |
| secondary hyperthyroidism | Hyperthyroidism due to stimulation of the thyroid gland by an excess of thyrotrophin secreted by the pituitary gland. (05 Mar 2000) |
| secondary hypogammaglobulinaemia | Immunodeficiency in which there is no evident defect in the lymphoid tissues, but rather hypercatabolism or loss of immunoglobulins such as occurs in familial idiopathic hypercatabolic hypoproteinaemia or in defects associated with the nephrotic syndrome. Synonym: secondary agammaglobulinaemia, secondary antibody deficiency, secondary hypogammaglobulinaemia. (05 Mar 2000) |
| secondary hypogonadism | Defective gonadal development or function, or both, resulting from inadequate secretion of pituitary gonadotropins. Synonym: hypogonadotropic eunuchoidism, secondary hypogonadism. (05 Mar 2000) |
| secondary hypothyroidism | Hypothyroidism that arises as a consequence of inadequate thyrotropin secretion by the anterior pituitary gland. (05 Mar 2000) |
| secondary immune response | The response of the immune system to the second or subsequent occasion on which it encounters a specific antigen. (18 Nov 1997) |