| hypothenar | <anatomy> Of or pertaining to the prominent part of the palm of the hand above the base of the little finger, or a corresponding part in the forefoot of an animal; as, the hypothenar eminence. Origin: Pref. Hypo- + thenar. <anatomy> The hypothenar eminence. Source: Websters Dictionary (01 Mar 1998) |
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| hypothenar eminence | The fleshy mass at the medial side of the palm. Synonym: eminentia hypothena'ris, antithenar, hypothenar prominence, hypothenar. (05 Mar 2000) |
| hypothenar prominence | The fleshy mass at the medial side of the palm. Synonym: eminentia hypothena'ris, antithenar, hypothenar prominence, hypothenar. (05 Mar 2000) |
| water hammer | <physics> 1. A vessel partly filled with water, exhausted of air, and hermetically sealed. When reversed or shaken, the water being unimpeded by air, strikes the sides in solid mass with a sound like that of a hammer. 2. A concussion, or blow, made by water in striking, as against the sides of a pipe or vessel containing it. Source: Websters Dictionary (01 Mar 1998) |
| water-hammer pulse | <radiology> Corrigan's sign: increased pulse at wrist, aortic insufficiency, widened pulse pressure due to increased stroke volume, diastolic regurgitation (12 Dec 1998) |
| hammer | 1. An instrument for driving nails, beating metals, and the like, consisting of a head, usually of steel or iron, fixed crosswise to a handle. "With busy hammers closing rivets up." (Shak) 2. Something which in firm or action resembles the common hammer; as: That part of a clock which strikes upon the bell to indicate the hour. The padded mallet of a piano, which strikes the wires, to produce the tones. <anatomy> That part of a gunlock which strikes the percussion cap, or firing pin; the cock; formerly, however, a piece of steel covering the pan of a flintlock musket and struck by the flint of the cock to ignite the priming. Also, a person of thing that smites or shatters; as, St. Augustine was the hammer of heresies. "He met the stern legionaries [of Rome] who had been the "massive iron hammers" of the whole earth." (J. H. Newman) Atmospheric hammer, a dead-stroke hammer in which the spring is formed by confined air. Drop hammer, Face hammer, etc. See Drop, Face, etc. Hammer fish. See Hammerhead. Hammer hardening, the process of hardening metal by hammering it when cold. <zoology> Hammer shell, any species of Malleus, a genus of marine bivalve shells, allied to the pearl oysters, having the wings narrow and elongated, so as to give them a hammer-shaped outline; called also hammer oyster. To bring to the hammer, to put up at auction. Origin: OE. Hamer, AS. Hamer, hamor; akin to D. Hamer, G. & Dan. Hammer, Sw. Hammare, Icel. Hamarr, hammer, crag, and perh. To Gr. Anvil, Skr. Aman stone. Source: Websters Dictionary (01 Mar 1998) |
| hammer finger | An avulsion, partial or complete, of the long finger extensor from the base of the distal phalanx. Synonym: drop finger, hammer finger, mallet finger. (05 Mar 2000) |
| hammer nose | A manifestation of severe acne rosacea resulting in significant enlargement of the nose and occurring primarily in men. It is caused by hypertrophy of the sebaceous glands and surrounding connective tissue. The nose is reddened and marked with numerous telangiectasias. (12 Dec 1998) |
| hammer toe | <orthopaedics> A deformity of the toe in which the toe is bent upward like a claw. most commonly seen in the second toe, the condition may be congenital or acquired. Ill fitting shoes (too short or too narrow a fit) can result in hammer toe. Mild cases can be treated with splinting or special shoe inserts. Severe cases may require surgery to straighten the toe. (06 Mar 2000) |
| Aarskog-Scott syndrome | A syndrome of ocular hypertelorism, anteverted nostrils, broad upper lip, saddle-bag scrotum, and laxity of ligaments resulting in genu recurvatum, flat feet, and hyperextensible fingers; X-linked and autosomal dominant forms. Synonym: Aarskog-Scott syndrome. (05 Mar 2000) |
| Aarskog syndrome | <syndrome> Grier et al. (1983) reported father and 2 sons with typical Aarskog syndrome, including short stature, hypertelorism, and shawl scrotum. They tabulated the findings in 82 previous cases. X-linked recessive inheritance has been repeatedly suggested. The family reported by Welch (1974) had affected males in 3 consecutive generations. Thus, there is either genetic heterogeneity or this is an autosomal dominant with strong sex-influence and possibly ascertainment bias resulting from use of the shawl scrotum as a main criterion. Stretchable skin was present in the cases of Grier et al. (1983). Teebi et al. (1993) reported the case of an affected mother and 4 sons (including a pair of monozygotic twins) by 2 different husbands. They suggested that the manifestations were as severe in the mother as in the sons and that this suggested autosomal dominant inheritance. Actually, the mother seemed less severely affected, compatible with X-linked inheritance. Clinical signs: Mild to moderate short stature,normocephaly, Widow's peak hair, maxillary hypoplasia, broad nasal bridge, anteverted nostrils, long philtrum, broad upper lip, curved linear dimple below the lower lip, hypertelorism, ptosis, down-slanted palpebral fissures, ophthalmoplegia, strabismus, hyperopic astigmatism, large cornea, floppy ears, lop-ears,cleft lip/palate, shawl scrotum, saddle-bag scrotum, cryptorchidism, brachydactyly, digital contractures, clinodactyly, mild syndactyly, transverse palmar crease, lymphoedema of the feet, ligamentous laxity, osteochondritis dissecans, proximal finger joint hyperextensibility, flexed distal finger joints, genu recurvatum, flat feet, stretchable skin, cervical spine hypermobility, odontoid anomaly, macrocytic anaemia, hemochromatosis, hepatomegaly, portal cirrhosis, imperforate anus, rectoperineal fistula, interstitial pulmonary disease, sternal deformity. Inheritance: Sex-influenced autosomal dominant form, also X-linked form. (05 Aug 1998) |
| abdominal muscle deficiency syndrome | <syndrome> Congenital absence (partial or complete) of abdominal muscles, in which the outline of the intestines is visible through the protruding abdominal wall; in males, genitourinary anomalies (urinary tract dilation and cryptorchidism) are also found; genetics unclear. (05 Mar 2000) |
| abstinence syndrome | <syndrome> A constellation of physiologic changes undergone by persons or animals who have become physically dependent on a drug or chemical due to prolonged use at elevated doses, but who are abruptly deprived of that substance. The abstinence syndrome varies with the drug to which dependence has developed. Generally the effects observed are in an opposite direction from those produced by the drug; e.g., the withdrawal syndrome from central nervous system depressants such as barbiturates and benzodiazepines consists of insomnia, restlessness, tremulousness, hallucinations, and, in the extreme, tonic-clonic convulsions which may prove fatal. The onset time and severity of the abstinence syndrome depend upon how rapidly the drug disappears from the body. (05 Mar 2000) |
| Achard syndrome | <syndrome> Arachnodactyly with small receding mandible, broad skull, and joint laxity limited to the hands and feet; genetics unclear. (05 Mar 2000) |
| Achard-Thiers syndrome | <syndrome> One form of a virilizing disorder of adrenocortical origin in women, characterised by masculinization and menstrual disorders in association with manifestations of diabetes mellitus, such as glucosuria. (05 Mar 2000) |