Definition of "sea-monster" [sea-monster]

• A huge, hideous, or terrible marine animal. (noun)
• Specifically, the chimera, Chimæra monstrosa. See cut under chimera. (noun)

The Century Dictionary (Public Domain)

• "That was all, and an entire ship's company stared down in silence and fear at a sea-monster grief-stricken over its dying progeny."
• "What's new: This post-300 action epic reworks the 1981 Greek myth-infused adventure best known for effects master Ray Harryhausen's stop-motion incarnations of Pegasus, snake-haired Medusa and sea-monster Kraken."
• "The boat and sea-monster, shown here, is just perfect."