Brown-Driver-Briggs (BDB)
H8314a
H8314a שָׂרָף a serpent , usu. venomous H8314b שָׂרָף pl. שְׂרָפִים seraphim
Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain
Strong's H8314 · Hebrew
saraph
saw-rawf'
from 8313; burning, i.e. (figuratively) poisonous (serpent); specifically, a saraph or symbolical creature (from their copper color)