Webster's Revised Unabridged Dictionary · 1913

Pantaloon

Pantaloon , noun

[French pantalon, from Italian pantalone, a masked character in the Italian comedy, who wore breeches and stockings that were all of one piece, from Pantaleone, the patron saint of Venice, which, as a baptismal name, is very frequent among the Venetians, and is applied to them by the other Italians as a nickname, from Greek Pantale`wn, lit., all lion, a Greek personal name.]

1.
A ridiculous character, or an old dotard, in the Italian comedy; also, a buffoon in pantomimes. — Addison
The sixth age shifts Into the lean and slippered pantaloon. — Shakespeare
2.
A bifurcated garment for a man, covering the body from the waist downwards, and consisting of breeches and stockings in one.
3.
In recent times, a loose-fitting variety of Trousers, often of less than ankle length.