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sigmoid curve

sigmoid curve In this historical source, a sigmoid curve is the pronounced S-shaped bend of the human vertebral column.

In this historical source, a sigmoid curve is the pronounced S-shaped bend of the human vertebral column. It is described as one of the bodily features associated with the fully erect walking posture of humans.

Also see

Sources

Drafting source: Baldwin Dictionary of Philosophy and Psychology, 1901. 1901 New York Macmillan original; archive index checked 2026-10-18. “Anthropoid” (Anthropoid).
public-domain-US · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: ac712e517e816ebc2ff1b9395d8ad30deec8126087e1df3f18dd372bfcabd223

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “sigmoid curve.” Development preview.

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