Webster's Revised Unabridged Dictionary · 1913

Mongoloid

Mongoloid , adjective

[Mongol + -oid.]

Resembling a Mongol or the Mongols; having race characteristics, such as color, hair, and features, like those of the Mongols. — Huxley
2.
Of, related to, or affected with, Down syndrome; -- not a technical term.

Mongoloid , noun

A person affected with Down syndrome; -- not a technical term.