| SEMI | subendocardial myocardial infarction |
|---|---|
| SIQR | semi-interquartile range |
| SP | sacroposterior; sacrum to pubis; salivary progesterone; schizotypal personality; semi-private [room]... |
| ln | natural logarithm |
| log | logarithm |
| MSRV | Modified Semi-Solid Rappaport Vassiliadis |
|---|---|
| SCC | semi-circular canals |
| LOD | Logarithm of odds |
| LogMAR | Logarithm of the minimum angle of resolution |
| LOD | logarithm of the odds |
| logarithm | <mathematics> One of a class of auxiliary numbers, devised by John Napier, of Merchiston, Scotland (1550-1617), to abridge arithmetical calculations, by the use of addition and subtraction in place of multiplication and division. The relation of logarithms to common numbers is that of numbers in an arithmetical series to corresponding numbers in a geometrical series, so that sums and differences of the former indicate respectively products and quotients of the latter; thus 0 1 2 3 4 Indices or logarithms 1 10 100 1000 10,000 Numbers in geometrical progression Hence, the logarithm of any given number is the exponent of a power to which another given invariable number, called the base, must be raised in order to produce that given number. Thus, let 10 be the base, then 2 is the logarithm of 100, because 10^2 = 100, and 3 is the logarithm of 1,000, because 10^3 = 1,000. Arithmetical complement of a logarithm, the difference between a logarithm and the number ten. Binary logarithms. See Binary. Common logarithms, or Brigg's logarithms, logarithms of which the base is 10; so called from Henry Briggs, who invented them. Gauss's logarithms, tables of logarithms constructed for facilitating the operation of finding the logarithm of the sum of difference of two quantities from the logarithms of the quantities, one entry of those tables and two additions or subtractions answering the purpose of three entries of the common tables and one addition or subtraction. They were suggested by the celebrated German mathematician Karl Friedrich Gauss (died in 1855), and are of great service in many astronomical computations. Hyperbolic, or Napierian, logarithms, those logarithms (devised by John Speidell, 1619) of which the base is 2.7182818; so called from Napier, the inventor of logarithms. Logistic or Proportionallogarithms. Origin: Gr. Word, account, proportion + number: cf. F. Logarithme. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| semi | <prefix> A prefix signifying half, and sometimes partly or imperfectly; as, semiannual, half yearly; semitransparent, imperfectly transparent. The prefix semi is joined to another word either with the hyphen or without it. In this book the hyphen is omitted except before a capital letter; as, semiacid, semiaquatic, semi-Arian, semiaxis, semicalcareous. Origin: L. Semi; akin to Gr, Skr. Sami-, AS. Sam-, and prob. To E. Same, from the division into two parts of the same size. Cf. Hemi-, Sandelend. (29 Oct 1998) |
| semi-apochromatic objective | <microscopy> A compromise, in the correction for chromatic and spherical aberration, between achromatic and apochromatic objectives, such as a fluorite objective. (05 Aug 1998) |
| semi-closed anaesthesia | Inhalation anaesthesia using a circuit in which a portion of the exhaled air is exhausted from the circuit and a portion is rebreathed following absorption of carbon dioxide. (05 Mar 2000) |
| semi-closed circle | A circuit for administration of an inhalation anaesthetic in which partial rebreathing with carbon dioxide absorption is combined with loss from the circuit of a portion of respired gases through valves. (05 Mar 2000) |
| semi-open anaesthesia | <anaesthetics> Inhalation anaesthesia in which a portion of inhaled gases is derived from an anaesthesia circuit while the remainder consists of room air. (05 Mar 2000) |
| semi pupa | <zoology> The young of an insect in a stage between the larva and pupa. Source: Websters Dictionary (01 Mar 1998) |
| semi-vegetarian | A vegetarian who consumes dairy products, eggs, chicken, and fish, but does not consume other animal flesh. (05 Mar 2000) |
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