| megaloblast | <haematology> A large nucleated cell which is the precurson to alterations of the red blood cell sequence, these cells are found almost exclusively in people with pernicious anaemia. (29 Oct 1998) |
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| orthochromatic | Denoting any tissue or cell that stains the colour of the dye used, i.e., the same colour as the dye solution with which it is stained. Synonym: euchromatic, orthochromophil, orthochromophile. Origin: ortho-+ G. Chroma, colour (05 Mar 2000) |