Origin of gill arch
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for gill arch
Note the gill-rakers, short and blunt, on the first gill-arch.Elementary Zoology, Second Edition
Vernon L. Kellogg
Von Baer also confirmed Rathke's discovery of the operculum, assigning it, however, to the second gill-arch.
Huschke was indeed the first to suggest that both upper and lower jaws were formed in the first gill-arch.
On the three bones forming the first gill-arch are attached numerous appendages called gill-rakers .A Guide to the Study of Fishes, Volume 1 (of 2)
David Starr Jordan
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.