Serpent

1. n. A bass wind instrument, of a loud and coarse tone, formerly much used in military bands, and sometimes introduced into the orchestra; — so called from its form.
2. n. Any reptile of the order Ophidia; a snake, especially a large snake. See Illust. under Ophidia.
3. n. Fig.: A subtle, treacherous, malicious person.
4. n. A species of firework having a serpentine motion as it passess through the air or along the ground.
5. n. The constellation Serpens.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.