| ECG | Electro-Cardio-Graphy(-Gram); ½ÉÀüµµ = EKG 1. Conducting System Structu... |
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| Ap4CH | apical four-chamber plane |
| beta [Greek letter beta] | an anomer of a carbohydrate; buffer capacity; carbon separated from a carboxyl by one other carbon i... |
| FH | facial hemihyperplasia; familial hypercholesterolemia; family history; fasting hyperbilirubinemia; f... |
| FMA | Frankfort mandibular plane angle |
| AVPD | atrio-ventricular plane displacement |
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| equatorial plane | In metaphase of mitosis, the plane that touches all of the centromeres and their spindle attachments. (05 Mar 2000) |
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| equatorial | <astronomy> An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an equatorial telescope. The term equatorial, or equatorial instrument, is sometimes applied to any astronomical instrument which has its principal axis of rotation parallel to the axis of the earth. Source: Websters Dictionary (01 Mar 1998) |
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| equatorial cleavage | Cleavage in which the plane of cytoplasmic division is at right angles to the axis of the ovum. (05 Mar 2000) |
| equatorial division | Nuclear division in which each chromosome divides equally. (05 Mar 2000) |
| equatorial guinea | A republic in central africa, north of gabon and bounded on the west by the atlantic ocean. Its capital is malabo. Equatorial guinea was discovered by the portuguese in 1491 and ceded to spain in 1778. The country gained independence in 1968. Equatorial refers to its location near the equator in the broad region long known as guinea . (12 Dec 1998) |
| equatorial plate | <cell biology> Region of the mitotic spindle where chromosomes are aligned at metaphase: as its name suggests, it lies midway between the poles of the spindle. (06 Mar 1998) |
| equatorial staphyloma | A staphyloma occurring in the area of exit of the vortex veins. Synonym: scleral staphyloma. (05 Mar 2000) |
| Aeby's plane | In craniometry, a plane perpendicular to the median plane of the cranium, cutting the nasion and the basion. (05 Mar 2000) |
| aperture plane | <microscopy> In a microscope adjusted for Koehler illumination, the conjugate planes that include the light source, the condenser iris diaphragm, the objective lens back aperture, and the eye point. Spaces in the aperture planes are the reciprocal of those in the field planes. (05 Aug 1998) |
| auriculo-infraorbital plane | A standard craniometric reference plane passing through the right and left porion and the left orbitale; drawn on the profile radiograph or photograph from the superior margin of the acoustic meatus to the orbitale. Synonym: auriculo-infraorbital plane, eye-ear plane, Frankfort horizontal plane, Frankfort plane, infraorbitomeatal plane. (05 Mar 2000) |
| axial plane | Transverse plane, as in CT scanning. Synonym: transaxial plane. (05 Mar 2000) |
| axiolabiolingual plane | A plane parallel to the long axis of a tooth and extending in a labiolingual direction. (05 Mar 2000) |
| axiomesiodistal plane | A plane parallel to the long axes of the teeth and extending in a mesiodistal direction. (05 Mar 2000) |
| back focal plane | <microscopy> The plane, normal to the lens axis, situated at the back focus of a lens. (05 Aug 1998) |
| bite plane | <dentistry> A removable appliance made of acrylic designed to open a deep bite. See: occlusal plane. (06 Mar 2000) |
| Bolton-Broadbent plane | A roentgenographic cephalometric plane extending from the Bolton point to nasion. Synonym: Bolton-Broadbent plane, Bolton-nasion line, Bolton-nasion plane. (05 Mar 2000) |
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