| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
|---|---|
| RR | radiation reaction; radiation response; rate ratio; rational recovery [group]; recovery room; relati... |
| RSA | rabbit serum albumin; regular spiking activity; relative specific activity; relative standard accura... |
| RAPD | Relative Afferent Pupillary Defect |
| RBE | Relative Biological Effectiveness |
| PD | Pocket Depth |
|---|---|
| PPD | Pocket Probing Depth |
| PPD | Probing Pocket Depth |
| aRR | Adjusted relative risk |
| FDR | first degree relative |
| gingival pocket | An abnormal extension of a gingival sulcus not accompanied by the apical migration of the epithelial attachment. (12 Dec 1998) |
|---|---|
| periodontal pocket | An abnormal extension of a gingival sulcus accompanied by the apical migration of the epithelial attachment and bone resorption. (12 Dec 1998) |
| 1. A bag or pouch; especially; a small bag inserted in a garment for carrying small articles, particularly money; hence, figuratively, money; wealth. 2. One of several bags attached to a billiard table, into which the balls are driven. 3. A large bag or sack used in packing various articles, as ginger, hops, cowries, etc. In the wool or hop trade, the pocket contains half sack, or about 168 Ibs.; but it is a variable quantity, the articles being sold by actual weight. 4. A hole or space covered by a movable piece of board, as in a floor, boxing, partitions, or the like. 5. <chemical> A cavity in a rock containing a nugget of gold, or other mineral; a small body of ore contained in such a cavity. A hole containing water. 6. <zoology> Same as Pouch. Pocket is often used adjectively, or in the formation of compound words usually of obvious signification; as, pocket comb, pocket compass, pocket edition, pocket handkerchief, pocket money, pocket picking, or pocket-picking, etc. Out of pocket. See Out, Pocket borough, a borough "owned" by some person. See Borough. Pocket gopher, a sheriff appointed by the sole authority of the crown, without a nomination by the judges in the exchequer. Origin: OE. Poket, Prov. F. & OF. Poquette, F. Pochette, dim. Fr. Poque, pouque, F. Poche; probably of Teutonic origin. See Poke a pocket, and cf. Poach to cook eggs, to plunder, and Pouch. Source: Websters Dictionary (01 Mar 1998) |
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| Seessel's pocket | The part of the embryonic foregut extending cephalad to the level of the oral plate and caudal to the pituitary diverticulum (Rathke's pouch). Synonym: preoral gut. (05 Mar 2000) |
| subcrestal pocket | A pocket extending apically below the level of the adjacent alveolar crest. Synonym: infrabony pocket, intrabony pocket. (05 Mar 2000) |
| Troltsch's pocket | Synonym: anterior recess of tympanic membrane, posterior recess of tympanic membrane. (05 Mar 2000) |
| blood relative | A relative of a person sharing some of the sources from which genes are derived. These will include many of the genes that operate in the blood and its constituents but no special importance attaches to the blood as a vehicle of inheritance. Spouses are not ordinarily blood relatives and when they are, the marriage is consanguineous and carries a higher risk than average of progeny homozygous by descent from ancestors in common. Such marriages are discouraged and within certain degrees of kindred may be illegal. Origin: a folk metaphor of breeding (05 Mar 2000) |
| relative | One who, or that which, relates to, or is considered in its relation to, something else; a relative object or term; one of two object or term; one of two objects directly connected by any relation. Specifically: A person connected by blood or affinity; strictly, one allied by blood; a relation; a kinsman or kinswoman. "Confining our care . . . To ourselves and relatives." . A relative prnoun; a word which relates to, or represents, another word or phrase, called its antecedent; as, the relatives " who", "which", "that". Source: Websters Dictionary (01 Mar 1998) |
| relative accommodation | Quantity of accommodation required for single binocular vision for any specified distance, or for any particular degree of convergence. (05 Mar 2000) |
| relative afferent pupillary defect | An asymmetry of the pupillomotor input between the two eyes; tested by alternating the light from one eye to the other and comparing the direct light reactions. (05 Mar 2000) |
| relative aperture | <microscopy> The ratio of the focal length of a lens to the diameter of its entrance pupil. This gives a number known as the f-number, usually written f:8, f:16, etc. Thus, if the focal length is divided by the number 8, 16, etc., the result will be the diameter of the entrance pupil of the lens, or if the diaphragm of the lens is wide open it will be very nearly the diameter of the free aperture of the lens. See: F-number. (05 Aug 1998) |
| relative basal area | An estimate of basal area for trees, such as produced by the Bitterlich sampling technique. (09 Oct 1997) |
| relative biological effectiveness | The ratio of radiation dosages required to produce identical change based on a formula comparing other types of radiation with that of gamma or roentgen rays. (12 Dec 1998) |
| relative dehydration | Water deficit relative to content of solutes contributing effective osmotic pressure; a state of increased effective osmotic pressure of body fluids. (05 Mar 2000) |
| relative immunity | A modified, not completely effective resistance that results when there is a sort of "fluctuating equilibrium" between the defense mechanisms of the host and the infective agent. (05 Mar 2000) |
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