An opening, as in the diaphragm. When there is an unusually wide opening in the diaphragm, there can be a hiatus (or hiatal) hernia. In Latin an hiatus is "an opening, gaping mouth, or chasm." It is derived from the verb "hiare" meaning "to gape or yawn." Therefore, a "hiatus" is a gaping opening in anything, such as the opening in a cliff leading into a cave or a break in the conversation in which nothing happens or is said.
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An aperture, opening, or foramen. [L. an aperture, fr. hio, pp. h., to yawn]
- adductor h. [TA] the aperture in the aponeurotic insertion of the adductor magnus that transmits the femoral artery and vein from the adductor canal to the popliteal space. SYN: h. adductorius [TA], femoral opening, h. tendineus, tendinous opening.
- h. adductorius [TA] SYN: adductor h..
- aortic h. [TA] the opening in the diaphragm bounded by the two crura, the vertebral column, and the median arcuate ligament, through which pass the aorta and thoracic duct. SYN: h. aorticus [TA], aortic foramen, aortic opening.
- h. aorticus [TA] SYN: aortic h..
- Breschet h. SYN: helicotrema.
- h. canalis facialis SYN: h. for greater petrosal nerve.
- h. canalis nervi petrosi majoris [TA] SYN: h. for greater petrosal nerve.
- h. canalis nervi petrosi minoris [TA] SYN: h. for lesser petrosal nerve.
- esophageal h. [TA] the opening in the right crus of the diaphragm, between the central tendon and the h. aorticus, through which pass the esophagus and the two vagus nerves. SYN: h. esophageus [TA], esophageal opening.
- h. esophageus [TA] SYN: esophageal h..
- h. ethmoidalis SYN: semilunar h..
- h. of facial canal SYN: h. for greater petrosal nerve.
- fallopian h. SYN: h. for greater petrosal nerve.
- h. for greater petrosal nerve [TA] the opening on the anterior aspect of the petrous part of the temporal bone that leads to the facial canal and gives passage to the greater petrosal nerve. SYN: h. canalis nervi petrosi majoris [TA], fallopian h., Ferrein foramen, h. canalis facialis, h. of facial canal.
- h. for lesser petrosal nerve [TA] the small opening in the petrous bone lateral to the h. for greater petrosal nerve that gives passage to the lesser petrosal nerve. SYN: h. canalis nervi petrosi minoris [TA], Arnold canal, canalis nervi petrosi superficialis minoris.
- h. maxillaris [TA] SYN: maxillary h..
- maxillary h. [TA] the large opening into the maxillary sinus on the nasal surface of the maxilla. SYN: h. maxillaris [TA].
- pleuropericardial h. an opening connecting the pleural and pericardial cavities; usually the result of incomplete development of the pleuropericardial fold of the embryo.
- pleuroperitoneal h. an opening through the diaphragm, connecting pleural and peritoneal cavities, usually the result of defective development of the pleuroperitoneal membrane in the embryo; if the defect is extensive there may be herniation of digestive organs into the pleural cavity. SEE ALSO: diaphragmatic hernia. SYN: Bochdalek foramen.
- sacral h. [TA] a normally occurring gap at the lower end of the sacrum, exposing the vertebral canal, due to failure of the laminae of the last sacral segment to coalesce. It is closed by the sacrococcygeal ligament, and provides cannular access to the sacral epidural space for administration of anesthetics (caudal nerve blocks). SYN: h. sacralis [TA].
- h. sacralis [TA] SYN: sacral h..
- saphenous h. SYN: saphenous opening.
- h. saphenus [TA] SYN: saphenous opening.
- scalene h. triangular gap bounded by the scalenus anterior and scalenus medius muscles and the first rib to which the muscles attach; the h. provides passage for the subclavian artery and the roots of the brachial plexus. Compression of the structures passing through the h. by any means is manifest as “thoracic outlet syndrome.” SYN: interscalene triangle.
- Scarpa h. SYN: helicotrema.
- semilunar h. [TA] a deep, narrow groove in the lateral wall of the middle meatus of the nasal cavity, into which the maxillary sinus, the frontonasal duct, and the middle ethmoid cells open. SYN: h. semilunaris [TA], h. ethmoidalis.
- h. semilunaris [TA] SYN: semilunar h..
- h. subarcuatus SYN: subarcuate fossa.
- h. tendineus SYN: adductor h..
- h. totalis sacralis developmental clefting in all sacral vertebrae; may also involve adjacent lumbar vertebrae.

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hi·a·tus hī-'āt-əs n a gap or passage through an anatomical part or organ esp a gap through which another part or organ passes

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an opening or aperture. For example, the diaphragm contains hiatuses for the oesophagus and aorta.

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hi·a·tus (hi-aґtəs) gen. and pl. hiaґtus [L.] a gap, cleft, or opening. hiatal adj

Medical dictionary. 2011.

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  • hiatus — [ jatys; jatys ] n. m. • 1521; mot lat. « ouverture », puis « hiatus » 1 ♦ Ling. Rencontre de deux voyelles, de deux éléments vocaliques, soit à l intérieur d un mot (ex. aérer, géant), soit entre deux mots énoncés sans pause (ex. tu as eu). L… …   Encyclopédie Universelle

  • Hiatus — (lat. hiatus „Öffnung“, „Spalt“, „Kluft“) steht für: im allgemeinen Sprachgebrauch: eine Lücke oder Unterbrechung medizinisch für das Fehlen von mittleren Reifungsstadien der weißen Blutkörperchen, siehe Hiatus leucaemicus in der Anatomie:… …   Deutsch Wikipedia

  • Hiatus — may refer to: Recess (break) Hiatus, a small difference in pitch between two musical tones (see Interval (music)) Hiatus (linguistics), a phonological term referring to the lack of a consonant separating two vowels in separate syllables, as in co …   Wikipedia

  • hiatus — I noun abeyance, adjournment, break, cessation, chasm, delay, disconnection, discontinuity, disjunction, disunion, fracture, gap, gulf, halt, hiatus, incompleteness, interference, interim, interlude, intermission, interregnum, interruption,… …   Law dictionary

  • Hiatus — Hi*a tus, n.; pl. L. {Hiatus}, E. {Hiatuses}. [L., fr. hiare, hiatum, to gape; akin to E. yawn. See {Yawn}.] 1. An opening; an aperture; a gap; a chasm; esp., a defect in a manuscript, where some part is lost or effaced; a space where something… …   The Collaborative International Dictionary of English

  • Hiatus — Hi*a tus, n.; pl. L. {Hiatus}, E. {Hiatuses}. [L., fr. hiare, hiatum, to gape; akin to E. yawn. See {Yawn}.] 1. An opening; an aperture; a gap; a chasm; esp., a defect in a manuscript, where some part is lost or effaced; a space where something… …   The Collaborative International Dictionary of English

  • Hiātus — (lat.), 1) Öffnung, besonders des Mundes; 2) (gr. Chasmodia), in der Metrik das Zusammentreffen eines kurzen Vocals am Ende des einen u. eines Vocals am Anfang des anderen Wortes. Die Griechen vermieden den H. entweder durch den Apostroph: τὸν δ… …   Pierer's Universal-Lexikon

  • hiatus — HIÁTUS, hiatusuri, s.n. v. hiat. Trimis de gall, 20.09.2007. Sursa: DEX 98  HIÁTUS s.n. v. hiat. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • hiatus — 1560s, break or opening in a material object, from L. hiatus opening, aperture, rupture, gap, from pp. stem of hiare to gape, stand open (see YAWN (Cf. yawn)). Sense of gap or interruption in events, etc. is first recorded 1610s …   Etymology dictionary

  • hiatus — [hī āt′əs] n. pl. hiatuses or hiatus [L, pp. of hiare, to gape < IE base * ĝhē , ĝhēi > GAP, GASP] 1. a break where a part is missing or lost, as in a manuscript; gap in a sequence; lacuna 2. any gap or interruption, as in continuity or… …   English World dictionary

  • Hiātus — (lat., »Kluft«), in der Prosodie das Zusammentreffen zweier Vokale am Ende eines und am Anfang des nächsten Wortes. Ein solcher H. wurde von den Griechen und Römern als Mißklang empfunden und daher im Vers im allgemeinen gemieden und nur in ganz… …   Meyers Großes Konversations-Lexikon

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