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ectoplasm

ectoplasm Ectoplasm is the outer layer of the protoplasm in some plant and animal cells.

Ectoplasm is the outer layer of the protoplasm in some plant and animal cells. In historical usage, it was first noted in certain single-celled organisms and later applied more broadly to tissue cells of higher plants and animals.

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Sources

Drafting source: Baldwin Dictionary of Philosophy and Psychology, 1901. 1901 New York Macmillan original; archive index checked 2026-10-18. “Ectoplasm” (Ectoplasm).
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PsychTerms (psychterms.org), CC BY 4.0, version 1. “ectoplasm.” Development preview.

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