a combining form meaning “horn,” “cornea,” used in the formation of compound words: ceratodus.
Also, kerat-.
Also, especially before a consonant, cerato-, kerato-.

< Greek kerāt-, combining form of kéras; akin to Latin cornū cornu, horn

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World English Dictionary
cerato- or (before a vowel) cerat-
combining form
1.  denoting horn or a hornlike part: ceratodus
2.  anatomy denoting the cornea
[from Greek kerat-, keras horn]
cerat- or (before a vowel) cerat-
combining form
[from Greek kerat-, keras horn]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

cerat- pref.
Variant of kerato-.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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