innominate bone

in·nom·in·ate bone
UK/ɪˌnɒmɪnət ˈbəʊn/US/ɪˌnɑmɪnət ˈboʊn/

noun

Synonym of hip bone (“one of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones, that together form the sides of the pelvis”).

First used early 18th c.

Meanings

nouninnominate bone (plural innominate bones)

plural innominate bones

  1. anatomySynonym of hip bone (“one of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones, that together form the sides of the pelvis”).First known use early 18th c.

    A partial innominate bone (Z8623) is known from the original collections[…], but it was probably from a juvenile individual, since the sutures between the ischium and iliac portions of the innominate are not completely fused up; the suture is unfused even within the acetabulum.

    2021, Donald R[oss] Prothero, Erin De Anda, Daniella Balassa, “The Postcranial Skeleton of Capromeryx minor, a Dwarf Pronghorn (Artiodactyla: Antilocapridae) from the Late Pleistocene of Rancho La Brea”, in Spencer G[eorge] Lucas, Adrian P. Hunt, Asher J. Lichtig, editors, Fossil Record 7 (Bulletin of the New Mexico Museum of Natural History and Science; 82), Albuquerque, N.M.: New Mexico Museum of Natural History and Science, →ISSN, →OCLC, page 328, column 2
    2 more examples

    From this second junction or plexus beneath the gluteus maximum muscle, are given usually three cutaneous nerves to the integument of the buttock: all these perforate the gluteus; one being found near the posterior superior spine of the innominate bone, another, the largest, near the end of the sacrum, and the remaining one being intermediate between the other two.

    1843 February 10, George Viner Ellis, “On the Posterior Divisions of the Spinal Nerves”, in The London Medical Gazette; Being a Weekly Journal of Medicine and the Collateral Sciences, volume I (New Series; volume XXXI overall), number 793, London: […] [Wilson and Ogilvy] for Longman, Brown, Green, & Longmans, […], →OCLC, page 698

    On its sides, in the upper two-thirds of its extent, the sacrum is closely united to the two pelvic or innominate bones, which, together with it, enclose a basin or cavity, called the pelvis. Examined in early life, each innominate bone is seen to consist of three parts, which meet at the articular cup, called the acetabulum, for the head of the thigh bone.

    1873, John Cleland, “The Skeleton”, in Animal Physiology: The Structure and Functions of the Human Body (Putnam’s Advanced Science Series), New York, N.Y.: G[eorge] P[almer] Putnam’s Sons, […], page 31

    Synonyms: innominate, innominatum, os coxae, os innominatum, hip bone

Synonyms & antonyms

nounSynonym of hip bone (“one of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones, that together form the sides of the pelvis”).

More synonyms by meaning

nounlarge flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis

Similar
Broader

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Late Latinos innōminātum
  2. Englishinnominate bone

From innominate (“having no name, nameless, unnamed”, adjective) + bone (noun), possibly a calque of Late Latin os innōminātum. It has been suggested that the bone “remains unnamed and unnameable” because it “is of so complex and irregular a form, that it bears no perceptible resemblance to any other known object”.

Full word history & related roots →

Translations

Greek ανώνυμος οστό
  • ανώνυμος οστό (anónymos ostó)one of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones (cognates) — see also hip bone
Korean 무명뼈
  • 무명뼈 (mumyeongppyeo)one of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones (cognates) — see also hip bone
Latin os innōminātum
  • os innōminātumone of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones (cognates) — see also hip bone
Malay tulang inominat
  • tulang inominatone of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones (cognates) — see also hip bone
Polish kość miedniczna
  • kość miednicznaone of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones (cognates) — see also hip bone
Spanish hueso innominado
  • hueso innominadoone of two roughly symmetrical parts of the skeleton, each composed of the fused iliac, ischial, and pubic bones (cognates) — see also hip bone

Rhymes & wordplay

Rhymes with innominate bone

All rhymes →
Cite this entry
APA

innominate bone. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/innominate%20bone

MLA

“innominate bone.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/innominate%20bone. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “innominate bone,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/innominate%20bone.

Source: innominate bone on Wiktionary, CC BY-SA 4.0.