noun, plural maxillae [mak-sil-ee] .
a jaw or jawbone, especially the upper.
one of the paired appendages immediately behind the mandibles of arthropods.

1670–80; < Neo-Latin, special use of Latin maxilla lower jaw, diminutive of māla (< *maxlā) upper jaw, cheekbone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
maxilla (mækˈsɪlə)
n , pl -lae
1.  See jaw the upper jawbone in vertebrates
2.  any member of one or two pairs of mouthparts in insects and other arthropods used as accessory jaws
[C17: New Latin, from Latin: jaw]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

"jaw, jawbone," 1676, from L. maxilla "upper jaw," dim. of mala "jaw, cheekbone."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

maxilla max·il·la (māk-sĭl'ə)
n. pl. max·il·las or max·il·lae (māk-sĭl'ē)
Either of a pair of irregularly shaped bones of the skull, fusing in the midline, supporting the upper teeth, and forming part of the eye sockets, hard palate, and nasal cavity; upper jaw.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
maxilla   (māk-sĭl'ə)  Pronunciation Key 
Plural maxillae (māk-sĭl'ē) or maxillas
The upper part of the jaw in vertebrate animals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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