Seraphim

"Mentioned in Isa. 6:2, 3, 6, 7. This word means fiery ones, in" "allusion, as is supposed, to their burning love. They are" "represented as "standing" above the King as he sat upon his" "throne, ready at once to minister unto him. Their form appears" "to have been human, with the addition of wings. (See" "[570]ANGELS.) This word, in the original, is used elsewhere only" "of the "fiery serpents" (Num. 21:6, 8; Deut. 8:15; comp. Isa." 14:29; 30:6) sent by God as his instruments to inflict on the people the righteous penalty of sin.

Definition of Seraphim:
"burning; fiery"