OPERA n.
ily, sometimes seen in hothouses. It has curious flowers which have some resemblance to a ballet dancer, whence the popular name. Called also dancing girls. -- Opera glass, a short telescope with concave eye lenses of low power, usually made double, that is, with a tube and set of glasses for each eye; a lorgnette; --…
ORRERY n.
An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.
PALL-MALL n.
A game formerly common in England, in which a wooden ball was driven with a mallet through an elevated hoop or ring of iron. The name was also given to the mallet used, to the place where the game was played, and to the street, in London, still called Pall Mall. [Written also pail-mail and pell-mell.] Sir K. Digby. Eve…