| herd instinct | Tendency or inclination to band together with and share the customs of others of a group, and to conform to the opinions and adopt the views of the group. Synonym: social instinct. (05 Mar 2000) |
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| herderite | <chemical> A rare fluophosphate of glucina, in small white crystals. Origin: Named after Baron von Herder, who discovered it. Source: Websters Dictionary (01 Mar 1998) |
| herdess | A shepherdess; a female herder. Source: Websters Dictionary (01 Mar 1998) |
| herdswoman | A woman who tends a herd. Source: Websters Dictionary (01 Mar 1998) |
| hereditary | <genetics> Transferred via genes from parent to child. (16 Dec 1997) |
| hereditary amyloidosis | <neurology> A disorder in which various peripheral nerves are infiltrated with amyloid and their functions disturbed, an abnormal prealbumin is also formed and is present in the blood; characteristically, it begins during mid-life and is found largely in persons of Portuguese descent. Other rare clinical types occur. Inheritance: autosomal dominant. Synonym: familial amyloidosis, hereditary amyloidosis. (05 Mar 2000) |
| hereditary angio oedema | <biochemistry> Condition in which there seems to be uncontrolled production of C2 kinin because of a deficiency in C1 inhibitor levels. (18 Nov 1997) |
| hereditary angioedema | A genetic form of angioedema. (angioedema is also referred to as quinke's disease.) persons with it are born lacking an inhibitor protein (called c1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of c1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioneurotic oedema. (12 Dec 1998) |
| hereditary angioneurotic oedema | A genetic form of angioedema. (angioedema is also referred to as quinke's disease.) persons with it are born lacking an inhibitor protein (called c1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of c1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioedema. (12 Dec 1998) |
| hereditary areflexic dystasia | A rare autosomal dominant neurological disorder with many of the clinical features of hereditary hypertrophic sensorimotor polyneuropathy combined with an essential tremor. Synonym: hereditary areflexic dystasia. (05 Mar 2000) |
| hereditary ataxia | A simple autosomal recessive trait in fox terrier dogs that produces a progressive general ataxia. (05 Mar 2000) |
| hereditary benign intraepithelial dyskeratosis | An autosomal dominant condition consisting of white spongy lesions of the buccal mucosa, floor of the mouth, ventral lateral tongue, gingiva and palate. Transient gelatinous plaques form over the cornea, which may produce temporary blindness, hereditary benign intraepithelial dyskeratosis. Synonym: hereditary benign intraepithelial dyskeratosis. (05 Mar 2000) |
| hereditary cerebellar ataxia | A disease of later childhood and early adult life, marked by ataxic gait, hesitating and explosive speech, nystagmus, and sometimes optic neuritis. It probably comprises several distinct conditions with diverse patterns of inheritance. Collective term for a number of hereditary disorders in which cerebellar signs are the most prominent finding. (05 Mar 2000) |
| hereditary chorea | A progressive disorder usually beginning in young to middle age, consisting of a triad of choreoathetosis, dementia, and autosomal dominant inheritance with complete penetrance. Bilateral marked wasting of the putamen and the head of the caudate nucleus is characteristic. Synonym: chronic progressive chorea, degenerative chorea, hereditary chorea, Huntington's disease. (05 Mar 2000) |
| hereditary coproporphyria | <haematology> A group of metabolic disorders that result from a disturbance in porphyrin metabolism, causing increased formation and excretion of porphyrin or its precursors. Acute intermittent porphyria is a rare inherited form that can result in abdominal pain, photosensitivity and neurological disturbances. The various forms can be differentiated measuring various blood prophyrins. Inheritance: autosomal dominant. (27 Sep 1997) |