Living material or protoplasm from a different individual or organism, used in older biological terminology.
From Greek 'allo-' (other, different) and 'plasma' (living substance), literally 'other-living-stuff'; used in early biology before modern cell biology clarified organism boundaries.
Alloplasm is an old word from when biologists weren't quite sure where one organism ended and another began—it's largely obsolete but shows how biological terminology evolved as microscopy got better.
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