Sestertius

Sestertius, a Roman coin either bronze or silver one-fourth of a denarius, originally worth 2½ asses but afterwards 4 asses, up to the time of Augustus was worth fully 2d., and subsequently one-eighth less; Sestertium, a Roman “money of account,” never a coin, equalled 1000 sestertii, and was valued at £8, 15s.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Sesostris * Settle, Elkanah
Seringapatam
Serjeant-at-Arms
Serpent, The
Serpukoff
Serrano y Dominguez
Sertorius
Servetus, Michael
Servia
Servius Tullius
Sesostris
Sestertius
Settle, Elkanah
Setubal
Seven Champions of Christendom
Seven Deadly Sins
Seven Dolours of the Virgin
Seven Sages of Greece
Seven Sleepers
Seven Wise Masters
Seven Wonders of the World
Seven Years' War