An organism that avoids or cannot tolerate calcium-rich environments, preferring acidic conditions.
From 'calci-' (calcium) + '-phobe' (fear of, from Greek 'phobos'). The -phobe suffix creates words for things that dislike or avoid a condition.
Calciphobes include blueberries, azaleas, and many orchids—these acid-loving plants actually evolved in environments where calcium was scarce, so they literally can't handle it when gardeners add limestone.
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