| mica | <chemical> The name of a group of minerals characterised by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in composition, and vary in colour from pale brown or yellow to green or black. The transparent forms are used in lanterns, the doors of stoves, etc, being popularly called isinglass. Formerly called also cat-silver, and glimmer. The important species of the mica group are: muscovite, common or potash mica, pale brown or green, often silvery, including damourite (also called hydromica); biotite, iron-magnesia mica, dark brown, green, or black; lepidomelane, iron, mica, black; phlogopite, magnesia mica, colourless, yellow, brown; lepidolite, lithia mica, rose-red, lilac. Mica (usually muscovite, also biotite) is an essential constituent of granite, gneiss, and mica slate; biotite is common in many eruptive rocks; phlogopite in crystalline limestone and serpentine. Mica diorite, a schistose rock, consisting of mica and quartz with, usually, some feldspar. Origin: L. Mica crumb, grain, particle; cf. F. Mica. Source: Websters Dictionary (01 Mar 1998) |
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| bifocal spectacles | Spectacles with bifocal lenses. See: lens. (05 Mar 2000) |
| pantoscopic spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| Masselon's spectacles | Spectacles with little offsets of metal with smooth edges which engage above the upper eyelid and keep it raised above the pupil in cases of paralytic blepharoptosis. Synonym: Masselon's spectacles. (05 Mar 2000) |
| photochromic spectacles | Spectacles with lenses that darken on exposure to ultraviolet light. (05 Mar 2000) |
| clerical spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| half-glass spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| safety spectacles | Spectacles which protect against ultraviolet or infrared rays or against mechanical injuries. Synonym: safety spectacles. (05 Mar 2000) |
| hemianopic spectacles | Spectacles with a prism or mirror to allow the individual with homonymous hemianopia to see objects in his blind half field. (05 Mar 2000) |
| protective spectacles | Spectacles which protect against ultraviolet or infrared rays or against mechanical injuries. Synonym: safety spectacles. (05 Mar 2000) |
| pulpit spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| spectacles | Lenses set in a frame that holds them in front of the eyes, used to correct errors of refraction or to protect the eyes. The parts of the spectacles are the lenses; the bridge between the lenses, resting on the nose; the rims or frames, encircling the lenses; the sides or temples that pass on either side of the head to the ears; the bows, the curved extremities of the temples; the shoulders, short bars attached to the rims or the lenses and jointed with the sides. Synonym: eyeglasses, glasses. Origin: L. Specto, pp. -atus, to watch, observe (05 Mar 2000) |
| stenopaic spectacles | Opaque disks with narrow slits in the centre allowing only a minimum amount of light to enter; used as a protection against snow blindness, spectacles having opaque disks with multiple perforations used to aid vision in incipient cataract and in discrete opacities of the cornea; occasionally used as a substitute for corrective lenses or sunglasses. (05 Mar 2000) |
| divers' spectacles | Strongly convex lenses for clear vision underwater. (05 Mar 2000) |
| divided spectacles | An early form of bifocal spectacles in which the lower half of the lens is for near vision, the upper half for distant vision. Synonym: divided spectacles. (05 Mar 2000) |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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