- one of a pair of bones of the upper jaw of vertebrates, situated in front of and between the maxillary bones.
Origin of premaxilla
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for premaxilla
Length of premaxilla less than two-and-a-half times that of the basis cranii.Extinct Birds
The premaxilla is rudimentary and loosely attached to the maxilla.
Beneath the naris the maxilla extends as a broad tapering shelf, the ventral surface of which articulates with the premaxilla.Two New Pelycosaurs from the Lower Permian of Oklahoma
Richard C. Fox
The premaxilla is very small; the zygomatic arch is imperfect, and does not reach the squamosal behind.The Cambridge Natural History, Vol X., Mammalia
Frank Evers Beddard
The small lacrimal bone anterior to the plate articulates with the maxilla and the premaxilla.Phylogeny of the Waxwings and Allied Birds
M. Dale Arvey
- either of two bones situated in the upper jaw between the maxillary bones
- Either of two bones located in front of and between the maxillary bones in the upper jaw of vertebrates.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.