Strong's #8565: tan (pronounced tan)

from an unused root probably meaning to elongate; a monster (as preternaturally formed), i.e. a sea-serpent (or other huge marine animal); also a jackal (or other hideous land animal):--dragon, whale. Compare 8577.

Brown-Driver-Briggs Hebrew Lexicon:

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tan

1) dragon, maybe the extinct dinosaur the plesiosaurus, whale

Part of Speech: noun masculine

Relation: from an unused root probably meaning to elongate

Usage:

This word is used 4 times:

 

Isaiah 34:13: "in the fortresses thereof: and it shall be a habitation of dragons, and a court for owls."
Isaiah 35:7: "springs of water: in the habitation of dragons, where each lay, shall be grass with reeds and rushes."
Isaiah 43:20: "The beast of the field shall honor me, the dragons and the owls: because I give"
Lamentations 4:3: "Even the sea monsters draw out the breast, they give suck to their young ones: the daughter of my people"