Secundum artem.—According to rule.

Selon les règles.—According to rule.

Semper fidelis.—Always faithful.

Semper idem.—Always the same.

Semper paratus.—Always ready.

Senatûs consultum.—A decree of the senate.

Seriatim.—In order; successively.

Si quæris peninsulam amœnam, circumspice.—If thou seekest a beautiful peninsula, behold it here.

Sic in originali.—So it stands in the original.

Sic itur ad astra.—Such is the way to immortality.