Definition (full): burning, poisonous, a saraph, symbolical creature
Strong's Exhaustive Concordance
From saraph; burning, i.e. (figuratively) poisonous (serpent); specifically, a saraph or symbolical creature (from their copper color) -- fiery (serpent), seraph.
KJV: And the LORD said unto Moses, Make thee a fiery serpent, and set it upon a pole: and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live.
NASB: Then the LORD said to Moses, "Make a fiery serpent, and set it on a standard; and it shall come about, that everyone who is bitten, when he looks at it, he will live."
KJV: Who led thee through that great and terrible wilderness, wherein were fiery serpents, and scorpions, and drought, where there was no water; who brought thee forth water out of the rock of flint;
NASB: "He led you through the great and terrible wilderness, with its fiery serpents and scorpions and thirsty ground where there was no water; He brought water for you out of the rock of flint.
KJV: Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly.
NASB: Seraphim stood above Him, each having six wings: with two he covered his face, and with two he covered his feet, and with two he flew.