| flint glass | <chemistry> A soft, heavy, brilliant glass, consisting essentially of a silicate of lead and potassium. It is used for tableware, and for optical instruments, as prisms, its density giving a high degree of dispersive power; so called, because formerly the silica was obtained from pulverized flints. Synonym: crystal glass. Cf. Glass. The concave or diverging half on an achromatic lens is usually made of flint glass. Source: Websters Dictionary (01 Mar 1998) |
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| lady's looking-glass | <botany> See Venus's looking-glass, under Venus. Source: Websters Dictionary (01 Mar 1998) |
| focusing glass | <microscopy> A hand magnifier, used at the focal plane of a camera, usually with the ground glass removed. Its purpose is to examine the image for critical focus. It is, as a rule, a low-power magnifier so mounted that it is in focus when supported on a piece of clear glass at the focal plane of the cam- era, for studying the image. It operates equally well on the aerial image. (05 Aug 1998) |
| abductor digiti minimi muscle of hand | Origin, pisiform bone and pisohamate ligament; insertion, medial side of base of proximal phalanx of the little finger; action, abducts and flexes little finger; nerve supply, ulnar. Synonym: musculus abductor digiti minimi manus, abductor muscle of little finger, musculus abductor digiti quinti. (05 Mar 2000) |
| accoucheur's hand | Position of the hand in tetany or in muscular dystrophy; the fingers are flexed at the metacarpophalangeal joints and extended at the phalangeal joints, with the thumb flexed and adducted into the palm; in resemblance to the position of the physician's hand in making a vaginal examination. Synonym: main d'accoucheur, obstetrical hand. (05 Mar 2000) |
| ape hand | A deformity marked by extension of the thumb in the same plane as the palm and fingers. Synonym: monkey hand, monkey-paw. (05 Mar 2000) |
| articulations of hand | These joints include the radiocarpal or wrist joint; intercarpal, carpometacarpal, intermetacarpal; metacarpophalangeal and interphalangeal joints. Synonym: articulationes manus, articulations of hand. (05 Mar 2000) |
| bloody hand | 1. A hand stained with the blood of a deer, which, in the old forest laws of England, was sufficient evidence of a man's trespass in the forest against venison. 2. A red hand, as in the arms of Ulster, which is now the distinguishing mark of a baronet of the United Kingdom. Source: Websters Dictionary (01 Mar 1998) |
| Marinesco's succulent hand | Oedema of the hand with coldness and lividity of the skin, observed in syringomyelia. Synonym: main succulente. (05 Mar 2000) |
| ghoul hand | A condition seen in African blacks, probably a manifestation of tertiary yaws, marked by depigmentation of the palms and contraction of the skin which give a clawlike and corpselike appearance to the hand's. (05 Mar 2000) |
| perforating arteries of hand | The perforating branches of the palmar metacarpal arteries, three small arteries that pass dorsally through the second, third, and fourth interosseous spaces of the hand from the palmar metacarpal arteries. Synonym: ramus perforantes arteriarum metacarpalium palmarium, perforating arteries of hand. (05 Mar 2000) |
| cleft hand | A congenital deformity in which the division between the fingers, especially between the third and fourth, extends into the metacarpal region. See: lobster-claw deformity. Synonym: main fourchee, split hand. (05 Mar 2000) |
| monkey hand | A deformity marked by extension of the thumb in the same plane as the palm and fingers. Synonym: monkey hand, monkey-paw. (05 Mar 2000) |
| writing hand | A contraction of the hand muscles in parkinsonism, bringing the fingers somewhat into the position of holding a pen. (05 Mar 2000) |
| crab hand | An infection caused by erysipelothrix rhusiopathiae that is almost wholly restricted to persons who in their occupation handle infected fish, shellfish, poultry, or meat. Three forms of this condition exist: a mild localised form manifested by local swelling and redness of the skin; a diffuse form that might present with fever; and a rare systemic form associated with endocarditis. (12 Dec 1998) |