SIENITIC
Si`e*nit"ic, a.
Defn: See Syenitic.
SIENNA
Si*en"na, n. Etym: [It. terra di Siena, fr. Siena in Italy.] (Chem.)
Defn: Clay that is colored red or brown by the oxides of iron or manganese, and used as a pigment. It is used either in the raw state or burnt. Burnt sienna, sienna made of a much redder color by the action of fire. — Raw sienna, sienna in its natural state, of a transparent yellowish brown color.
SIENNESE
Si`en*nese", a.
Defn: Of or pertaining to Sienna, a city of Italy.
SIERRA
Si*er"ra, n. Etym: [Sp., properly, a saw, fr. L. serra a saw. See
Serrate.]
Defn: A ridge of mountain and craggy rocks, with a serrated or irregular outline; as, the Sierra Nevada. The wild sierra overhead. Whitter.
SIESTA Si*es"ta, n. Etym: [Sp., probably fr. L. sessitare to sit much or long, v. freq. of sedere, sessum, to sit. See Sit.]
Defn: A short sleep taken about the middle of the day, or after dinner; a midday nap.