premaxilla

premaxilla
(noun, plural premaxillae)
one of the paired, superficial, usually toothed, dermal bones of the upper jaw, proximal or anterior to the maxillaries; in primitive Teleostomi they comprise the middle, in more advanced forms they may comprise the whole, of the oral edge of the upper jaw. Teeth may be present. In Diodontidae, the premaxillae are ankylosed and form a single bone. Absent in Chondrostei. In Holostei (Lepisoteus and Amia) the bone has two ossification centres and therefore is a double bone. Holostei and Teleostei have an ascending process anteriorly but these may not be homologous. Posterior to the ascending process in Teleostei there may be an articular and a postmaxillary process, and a posterior extension, the caudal process. Also called premaxillary, surmaxillary, bimaxillary or intermaxillary

Dictionary of ichthyology. 2009.

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  • Premaxilla — Pre max*il la, n.; pl. {Premaxill[ae]}. [NL. See {Pre }, and {Maxilla}.] (Anat.) A bone on either side of the middle line between the nose and mouth, forming the anterior part of each half of the upper jawbone; the intermaxilla. In man the… …   The Collaborative International Dictionary of English

  • premaxilla — [prē΄mak sil′ə] n. pl. premaxillae [prē΄maks il′ē] [ModL: PRE & MAXILLA] either of two bones in the upper jaw of vertebrates, situated between and in front of the maxillae, and fusing with them in the adult human being premaxillary [prē΄maks′i… …   English World dictionary

  • Premaxilla — Infobox Embryology Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Caption2 = System = CarnegieStage = Days = Precursor = median nasal prominence GivesRiseTo = MeshName = MeshNumber = DorlandsPre = p 32 DorlandsSuf = 12664417 The… …   Wikipedia

  • Premaxilla — pirmykštis gomurys statusas T sritis embriologija atitikmenys: lot. Palatum primarium; Premaxilla ryšiai: platesnis terminas – vidurinė gomurio atauga …   Medicininės histologijos ir embriologijos vardynas

  • Premaxilla — tarpžandikaulis statusas T sritis embriologija atitikmenys: lot. Palatum primarium; Premaxilla ryšiai: platesnis terminas – tarpžandikaulinė pirmykščio gomurio sritis sinonimas – pirmykštis gomurys …   Medicininės histologijos ir embriologijos vardynas

  • Premaxilla — premaksila statusas T sritis embriologija atitikmenys: lot. Premaxilla ryšiai: platesnis terminas – žandikaulio ydos …   Medicininės histologijos ir embriologijos vardynas

  • Premaxilla — tarpžandikaulis statusas T sritis embriologija atitikmenys: lot. Premaxilla ryšiai: platesnis terminas – skilusios lūpos laikotarpis …   Medicininės histologijos ir embriologijos vardynas

  • premaxilla — noun Etymology: New Latin Date: 1866 either of a pair of bones of the upper jaw of vertebrates between and in front of the maxillae • premaxillary adjective or noun …   New Collegiate Dictionary

  • premaxilla — premaxillary /pree mak seuh ler ee/, adj. /pree mak sil euh/, n., pl. premaxillae / mak sil ee/. Anat., Zool. one of a pair of bones of the upper jaw of vertebrates, situated in front of and between the maxillary bones. [1865 70; < NL praemaxilla …   Universalium

  • premaxilla — noun Either of a pair of bones in front of the maxillary bones in the upper vertebrate jaw …   Wiktionary

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