mandible

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Related to Dentary: incus, Dentary Bone

mandible

1. the lower jawbone in vertebrates
2. either of a pair of mouthparts in insects and other arthropods that are usually used for biting and crushing food
3. Ornithol either the upper or the lower part of the bill, esp the lower part
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

mandible

[′man·də·bəl]
(anatomy)
The bone of the lower jaw.
The lower jaw.
(invertebrate zoology)
Any of various mouthparts in many invertebrates designed to hold or bite into food.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Mesial to the first maxillary tooth there are four dentary teeth positions and distal to it, 12 to 13 dentary teeth positions can be counted.
47-48) found that (1) the families Bothidae, Paralichthyidae, Achiridae and Cynoglossidae have longer upper and lower jaws on the blind side than on the eye side, (2) common to the Bothidae and Paralichthyidae is to have a slight curvature of the mouth on both sides, and to share a similar number and size of teeth on the premaxilla and dentary on both sides and (3) common to the Achiridae and Cynoglossidae is to have a stronger curvature of the mouth on the blind side, more abundant teeth on the premaxilla and dentary of the blind side and few teeth or no teeth on the eye side.
Its posterior maxillary and dentary teeth have anteroposteriorly rather than transversely aligned crowns with serrated apical ridges (Sues and Baird 1998).
Notiosorex villai is known only by modern specimens from central Tamaulipas (Carraway and Timm, 2000).The differential diagnosis for this species provided by Carraway and Timm (2000) uses qualitative features of the glenoid fossa and measurements of the cranium and coronoid process of the dentary that are not preserved in the Terapa specimens, so no comparisons can be made.
The PCS shrew does not have an enlarged condylar process and laterally offset articular facets separated by a groove from the body of the dentary; therefore, it differs from the Nectogalini.
The following counts were taken: 1) Number of teeth on premaxillary; 2) Number of teeth on dentary; 3) Number of teeth on maxillary; 4) Number of scales in lateral line; 5) Number of scales in transversal line; 6) Number of circumpeduncular scale series; 7) Number of dorsal-fin rays; 8) Number of pectoral-fin rays; 9) Number of pelvic-fin rays; 10) Number of anal-fin rays; 11) Number of caudal fin rays; 12) Number of gill-rakers on first left-side branchial arch.
Description: PC-GCUF 09/23 is a well preserved right mandibular ramus with P4-M1, other portion of the dentary is missing (Fig.
Upper and lower length (UL, LL) and width (UW, LW) were obtained at the bone level on either the maxilla or the dentary. Lengths were measured from the most anterior portion of the canine to the most posterior.
133: 0 [right arrow] 1, absence of adductor mandibulae Aw), with the genus Phractolaemus (249: 0 [right arrow] 1, mandible highly modified, the dentary bone being roughly perpendicular to the main body of the mandible), and with the genus Chanos (216: 0 [right arrow] 1, presence of prominent, thin, dorsally/anterodorsally oriented anterodorsal projection of opercle).