Lindworm or lindorm (cognate with Old Norse linnormr "snake", German lindwurm "dragon", Scandinavian languages lindorm "seaserpent", from two Germanic roots meaning roughly "constrictor snake"), in British heraldry, is a technical term for a wingless bipedal dragon. In Scandinavian heraldry, lindorm is a technical term for a 'seaserpent' (sjøormer).
Generally, lindworm was equivalent to Latin draco thus could refer to any draconic creature.
In European mythology and folklore, creatures identified as a 'lindworm' may be winged or wingless, plus quadrapedal, bipedal or limbless. 'Lindworm snake' may specify a limbless dragon.