| filar micrometre | <microscopy> An eyepiece equipped with a fiducial line in its focal plane that is movable by means of a calibrated micrometre screw in order to make accurate measurements of length. Synonym: filar eyepiece. (05 Aug 1998) |
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| filar micrometre ocular | <microscopy> A micrometre ocular with crossed lines which can be simultaneously focused in and moved across the field by means of a micrometre screw. The amount of displacement can be read in 0.01 steps on the micrometre drum head. This makes a very delicate measuring device, since calibration of the micrometre scale by means of a stage micrometre gives values for each interval on the drum head which are much less than the resolving power of the highest-aperture objectives. (05 Aug 1998) |
| micrometre | One-millionth of a metre, or ten to the minus sixth metre (abbreviated um), the unit used for measuring microorganisms. (09 Oct 1997) |
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| micrometre disk | <microscopy> A glass disk engraved with a suitable scale, used at the diaphragm of a micrometre ocular. The scale to be focused by the eye lens has to be seen in the field of view. Micrometre eye piece. (05 Aug 1998) |
| stage micrometre | <microscopy> A graduated scale used as a standard on the stage of a light microscope for calibrating an eyepiece micrometre, also for determining the magnification of a set-up in photomicrography, etc. (05 Aug 1998) |
| filar | <optics> Of or pertaining to a thread or line; characterised by threads stretched across the field of view; as, a filar microscope; a filar micrometer. Origin: L. Filum a thread. Source: Websters Dictionary (01 Mar 1998) |
| filar eyepiece | |
| filar mass | A filamentous plasmatic material, beaded with granules, demonstrable by means of vital staining in the immature red blood cells. Synonym: alpha substance, filar mass, filar substance, substantia reticularis, substantia reticulofilamentosa. Synonym: reticular formation. (05 Mar 2000) |
| filar micrometer | An ocular micrometer with a line moved by a ruled drum such that a movement of the line of 5 um or less may be made in relation to fixed parallel lines. (05 Mar 2000) |
| filar substance | A filamentous plasmatic material, beaded with granules, demonstrable by means of vital staining in the immature red blood cells. Synonym: alpha substance, filar mass, filar substance, substantia reticularis, substantia reticulofilamentosa. Synonym: reticular formation. (05 Mar 2000) |