| GA | Gamblers Anonymous; gastric analysis; gastric antrum; general anesthesia; general angiography; gener... |
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| SDU | standard deviation unit; step-down unit |
| STEP | Sequential Test of Educational Programs |
| SDH | Step-down heating |
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| Ra | Rate of appearance |
| UNA | Urea nitrogen appearance |
| appearance | 1. The act of appearing or coming into sight; the act of becoming visible to the eye; as, his sudden appearance surprised me. 2. A thing seed; a phenomenon; a phase; an apparition; as, an appearance in the sky. 3. Personal presence; exhibition of the person; look; aspect; mien. "And now am come to see . . . It thy appearance answer loud report." (Milton) 4. Semblance, or apparent likeness; external show. Outward signs, or circumstances, fitted to make a particular impression or to determine the judgment as to the character of a person or a thing, an act or a state; as, appearances are against him. " There was upon the tabernacle, as it were, the appearance of fire." (Num. Ix. 15) "For man looketh on the outward appearance." (1 Sam. Xvi. 7) "Judge not according to the appearance." (John. Vii. 24) 5. The act of appearing in a particular place, or in society, a company, or any proceedings; a coming before the public in a particular character; as, a person makes his appearance as an historian, an artist, or an orator. "Will he now retire, After appearance, and again prolong Our expectation?" (Milton) 6. Probability; likelihood. "There is that which hath no appearance." (Bacon) 7. The coming into court of either of the parties; the being present in court; the coming into court of a party summoned in an action, either by himself or by his attorney, expressed by a formal entry by the proper officer to that effect; the act or proceeding by which a party proceeded against places himself before the court, and submits to its jurisdiction. To put in an appearance, to be present; to appear in person. To save appearances, to preserve a fair outward show. Synonym: Coming, arrival, presence, semblance, pretense, air, look, manner, mien, figure, aspect. Origin: F. Apparence, L. Apparentia, fr. Apparere. See Appear. Source: Websters Dictionary (01 Mar 1998) |
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| sequence ladder | The array of bands, made conspicuous by labeling, when DNA fragmented by endonucleases is subject to gel electrophoresis; corresponds to the nucleotide sequence. (05 Mar 2000) |
| fish ladder | A series of descending weirs which carry water around a dam or waterfall to facilitate the upstream migration of fish. (09 Oct 1997) |
| ladder | 1. A frame usually portable, of wood, metal, or rope, for ascent and descent, consisting of two side pieces to which are fastened cross strips or rounds forming steps. "Some the engines play, And some, more bold, mount ladders to the fire." (Dryden) 2. That which resembles a ladder in form or use; hence, that by means of which one attains to eminence. "Lowliness is young ambition's ladder." (Shak) Fish ladder. See Fish. Ladder beetle, a spiral marine shell of the genus Scalaria. See Scalaria. Origin: OE. Laddre, AS. Hlder, hldder; akin to OFries. Hladder, OHG.leitara, G. Leiter, and from the root of E. Lean, v. See Lean, and cf. Climax. Source: Websters Dictionary (01 Mar 1998) |
| ladder splint | A flexible splint consisting of two stout parallel wires with finer cross wires. Synonym: Cramer wire splint. (05 Mar 2000) |
| bimolecular step | <chemistry> Two species are reacting and form the transition state (09 Jan 1998) |
| rate-limiting step | <biochemistry> The slowest step in a metabolic pathway, or the step in an enzymatic reaction that requires the greatest amount of energy to initiate. (17 Dec 1997) |
| Master's two-step exercise test | An early and long-used exercise challenge to identify ischemic heart disease using a pair of nine inch steps with a platform on top, the number of trips by the patient arbitrarily chosen and related to age and body weight. See: two-step exercise test. Synonym: Master's two-step exercise test. (05 Mar 2000) |
| Gomori's one-step trichrome stain | <technique> A connective tissue stain that uses haematoxylin and a dye mixture containing chromotrope 2R and light green or aniline blue; muscle fibres appear red, collagen is green (or blue if aniline blue is used), and nuclei are blue to black. (05 Mar 2000) |
| Ronne's nasal step | A nasal visual field defect with one margin corresponding to the retinal horizontal medium; seen in glaucoma. (05 Mar 2000) |
| step | 1. In dentistry, a dove-tailed or similarly shaped projection of a cavity prepared in a tooth into a surface perpendicular to the main part of the cavity for the purpose of preventing displacement of the restoration (filling) by the force of mastication. 2. A change in direction resembling a stair-step in a line, a surface, or the construction of a solid body. 3. To move the foot in walking; to advance or recede by raising and moving one of the feet to another resting place, or by moving both feet in succession. 4. A prefix used before father, mother, brother, sister, son, daughter, child, etc, to indicate that the person thus spoken of is not a blood relative, but is a relative by the marriage of a parent; as, a stepmother to X is the wife of the father of X, married by him after the death of the mother of X. See Stepchild, Stepdaughter, Stepson, etc. (11 Feb 2000) |
| one-step procedure | A procedure in which a surgical biopsy is performed under general anesthesia and if cancer is found, a mastectomy or lumpectomy is done immediately as part of the same operation. (09 Oct 1997) |
| elementary step | <chemistry> Reaction mechanisms are broken down into elementary steps. For each step the the reactants are directly involved in forming the transition state. Therefore a rate law can be written from an elementary step but not from an overall reaction. (09 Jan 1998) |
| two-step exercise test | A test used mainly for coronary insufficiency; significant depression of RS-T in the electrocardiogram is considered abnormal and suggests coronary insufficiency. (05 Mar 2000) |
| two-step procedure | <surgery> When surgical biopsy and breast surgery are performed in two separate surgeries. (09 Oct 1997) |
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