Lacking color, colorless, or not readily taking up color or dyes in biological staining.
From Greek 'a-' (without) + 'chroma' (color) + '-ic' (adjective suffix). This straightforward term describes anything characterized by the absence of color or inability to absorb color.
In biology, calling something 'achromic' is actually a red flag for scientists—it often means they need different tools to study it, which has driven innovations in fluorescence microscopy and electron microscopy!
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