| automated differential leukocyte counter | An instrument using digital imaging or cytochemical techniques to differentiate leukocytes. (05 Mar 2000) |
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| refractor | <optics> Anything that refracts; specifically: A refracting telescope, in which the image to be viewed is formed by the refraction of light in passing through a convex lens. Source: Websters Dictionary (01 Mar 1998) |