prenasal


Also found in: Dictionary, Wikipedia.

pre·na·sal

(prē-nā'zăl)
In front of the nose.
Synonym(s): praenasal.
References in periodicals archive ?
Among 12 measurements of characters (excluding TL), as well as nuchal thorn counts, maturity size, and coloration, NP individuals were distinguished by 8 of the 15 characters (disc width, dorsal head length, distance between orbits, distance between nostrils, distance between 1st gill openings, maturity size, nuchal thorn, and coloration), but OS individuals were distinguished by 6 of the 15 characters (dorsal snout length, eye diameter, ventral head length, ventral snout length, prenasal snout length, and nuchal thorn) (see Tables 3--4; Figs.
(A, B) eye diameter, males and females, (C, D) distance between orbits, males and females, (E, P) prenasal snout length, males and females, (G, H) distance between nostrils, males and females.
On MRI, sincipital encephalocele will present as a glabellar, prenasal, nasal, or nasal septum mass, which is continuous with the intracranial contents, contains CSF signal intensity fluid and brain parenchyma (which may be T2 hyperintense secondary to gliosis).
2.3-2.5 and 2.1-2.4 times internasal width, prenasal length 9.7-10.1% DW vs.
Characters studied without reference to region were distribution of denticles on the dorsal (DZ) and ventral (DVS) surfaces of the rostrum (both measured from the distal tip), length (P) from the distal tip of the rostrum to the distal extremity of the prenasal bone, presence or absence of denticles on the prenasal bone, and length from the tip along the ventral surface where the fused premaxillae divide (VSPM) into separate bones.
Maxilla.--Six morphometric characters were studied, five in the triangular region (tr) that articulates with the nasal, premaxillae, prenasal, and vomer: length of the triangle (ML), height of the triangle (MH), width from the lateral surface of the triangle to the medial margin of the facet (fv) for articulation with the vomer (MW), and height (MVH) and width (MVW) of the facet.
The left prenasal (pn) is complete, except for a middle segment, and the right pn is poorly preserved, except for its most distal extension onto the rostrum.
Anatomical abbreviations: A, articular; DE, dentary; LA, lacrimal; LE, lateral ethmoid; M, maxillary; NA, nasal; NC, nutrient canal; PD, predentary; PM, premaxilla; PN, prenasal; S, sclerotic; + denotes extinct taxon.
Characters studied without reference to region were: distribution of denticles on the dorsal surface of the rostrum measured from the distal tip (DZ); length from distal tip where denticles are absent from the ventral mid-line (DVS); length from the distal tip to the distal extremity of t he prenasal (P); length from tip where fused premaxillae divide into separate bones (VSPM); and presence or absence of denticles on the prenasal.
Using the techniques of Fierstine and Crimmen (1996) and Fierstine (2001), a cross-section was estimated to be at 0.5L if the prenasal bone was large, and at 0.25L if the prenasal bone was tiny or absent.
I account for the universal preference for sounds like [[sup.m]b] over those like [[sup.m]f] with a constraint I refer to here and below as PRENASAL in (8).
(18) PRENASAL: Prenasalized continuants are prohibited.