Describing a cell or tissue that does not readily absorb or hold colored dyes when stained under a microscope.
From Greek 'a-' (without) + 'chroma' (color) + 'philos' (loving). A histology term created in the late 19th century to describe how different tissues interact with laboratory stains.
In the microscopy world, achromatophil tissues are like water-resistant fabric that refuses to take dye—this resistance itself tells pathologists important things about whether tissues are healthy or diseased.
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