| RNA, guide | Small kinetoplastid mitochondrial RNA that plays a major role in RNA editing. These molecules form perfect hybrids with edited mRNA sequences and possess nucleotide sequences at their 5'-ends that are complementary to the sequences of the mRNA's immediately downstream of the pre-edited regions. (12 Dec 1998) |
|---|---|
| guide | 1. A person who leads or directs another in his way or course, as in a strange land; one who exhibits points of interest to strangers; a conductor; also, that which guides; a guidebook. 2. One who, or that which, directs another in his conduct or course of lifo; a director; a regulator. "He will be our guide, even unto death." (Ps. Xlviii. 14) 3. Any contrivance, especially one having a directing edge, surface, or channel, for giving direction to the motion of anything, as water, an instrument, or part of a machine, or for directing the hand or eye, as of an operator; as: A blade or channel for directing the flow of water to the wheel buckets. <surgery> A strip or device to direct the compositor's eye to the line of copy he is setting. 4. A noncommissioned officer or soldier placed on the directiug flank of each subdivision of a column of troops, or at the end of a line, to mark the pivots, formations, marches, and alignments in tactics. Guide bar, an additional rail, between the others, gripped by horizontal driving wheels on the locomotive, as a means of propulsion on steep gradients. Origin: OE. Giae, F. Guide, It. Guida. Source: Websters Dictionary (01 Mar 1998) |
| guide plane | A fixed or removable device used to displace a single tooth, an arch segment, or an entire arch toward an improved relationship. (05 Mar 2000) |
| guide RNA | <molecular biology> Small RNA molecules that hybridise to specific mRNAs and direct their RNA editing. (18 Nov 1997) |
| mold guide | A guide used to specify the shape of artificial teeth, or of an artificial tooth. (05 Mar 2000) |
| condylar guide | The mechanical device on an articulator which is intended to produce guidance in articulator movement, similar to those produced by the paths of the condyles in the temporomandibular joints. See: condylar guidance inclination. Synonym: condylar guide. (05 Mar 2000) |
| incisal guide | In dentistry, that part of an articulator on which the anterior guide pin rests to maintain the vertical dimension of occlusion and the incisal guide angle as established by the incisal guidance; may be adjustable, with a superior surface that may be changed to provide variations in the incisal guide angle, or customised, being individually formed in plastic to allow other than straight line incisal guidance in eccentric movements. Synonym: anterior guide. (05 Mar 2000) |
| incisal guide angle | The angle formed with the horizontal plane by drawing a line in the sagittal plane between incisal edges of the maxillary and mandibular central incisors when the teeth are in centric occlusion. (05 Mar 2000) |
| acoustic reference level | The biological reference level for sound measurements. When the term decibel is used to indicate the noise level, a reference quantity is implied; this reference value is usually expressed as a sound pressure of 20 micronewtons per square meter. The reference level is referred to as 0 decibels, the baseline of the scale of noise level's; this baseline is considered the weakest sound that can be heard by a person with very good hearing in an extremely quiet location. Other equivalent reference level's still being used include 0.0002 microbar and 0.0002 dyne per square centimeter. (05 Mar 2000) |
| reference | The act of referring or consulting, something that refers to something else. (18 Nov 1997) |
| reference books | Books designed by the arrangement and treatment of their subject matter to be consulted for definite terms of information rather than to be read consecutively. Reference books include dictionaries, encyclopedias, atlases, etc. (12 Dec 1998) |
| reference books, medical | Books in the field of medicine intended primarily for consultation. (12 Dec 1998) |
| reference electrode | An electrode expected to have a constant potential, such as a calomel electrode, and used with another electrode to complete an electrical circuit through a solution; e.g., when a reference electrode is used with a glass electrode for pH measurement, changes in voltage between the two electrode's can be attributed to the effects of pH on the glass electrode alone. (05 Mar 2000) |
| reference method | An analytical procedure sufficiently free of random or systematic error to make it useful for validating proposed new analytical procedures for the same analyte. (05 Mar 2000) |
| reference standards | A basis of value established for the measure of quantity, weight, extent or quality, e.g. Weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy. (12 Dec 1998) |