Webster's Revised Unabridged Dictionary · 1913

Serpentine

Serpentine , adjective

[Latin serpentinus: compare French serpentin.]

Resembling a serpent; having the shape or qualities of a serpent; subtle; winding or turning one way and the other, like a moving serpent; anfractuous; meandering; sinuous; zigzag; as, serpentine braid.
Thy shape Like his, and color serpentine. — Milton

Serpentine , noun

[Compare (for sense 1) French serpentine, (for sense 2) serpentin.]

1.
(Mineralogy) A mineral or rock consisting chiefly of the hydrous silicate of magnesia. It is usually of an obscure green color, often with a spotted or mottled appearance resembling a serpent's skin. Precious, or noble, serpentine is translucent and of a rich oil-green color.

Serpentine has been largely produced by the alteration of other minerals, especially of chrysolite.

2.
(Ordnance) A kind of ancient cannon.

Serpentine , intransitive verb

To serpentize. [Rare] — Lyttleton