The Greek adjective ametor means "without a mother." This rare term appears in Hebrews 7:3, describing Melchizedek as "without father or mother, without genealogy" — emphasizing the uniqueness of his priesthood.
The description of Melchizedek as ametor does not mean he literally had no parents, but that his priestly qualifications are not derived from human ancestry. The Levitical priesthood required documented genealogy; Melchizedek's transcends that system. Christ's priesthood is after Melchizedek's order — not based on descent but on the power of an indestructible life (Hebrews 7:16).