| IRF | idiopathic retroperitoneal fibrosis; impulse response function; interferon regulatory factor; intern... |
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| KF | Kenner-fecal medium; kidney function; Klippel-Feil [syndrome] |
| LFS | lateral facet syndrome; Li-Fraumeni syndrome; limbic forebrain structure; liver function series |
| LSF | linear spread function; lymphocyte-stimulating factor |
| LVF | left ventricular failure; left ventricular function; left visual field; low-voltage fast; low-voltag... |
| frequency analysis | <ecology, statistics> A method of evaluating vegetation in an area by establishing a transect and counting the occurrences of plant species at various sampling points along the transect. (07 Apr 1998) |
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| least-squares analysis | A principle of estimation in which the estimates of a set of parameters in a statistical model are those quantities minimizing the sum of squared differences between the observed values of a dependent variable and the values predicted by the model. (12 Dec 1998) |
| linkage analysis | <genetics> Study aimed at establishing linkage between genes. Today linkage analysis serves as a way of gene-hunting and genetic testing. (12 Dec 1998) |