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costo-

a combining form meaning “rib,” used in the formation of compound words: costoclavicular.

Also, especially before a vowel, cost-.

Origin:
< Latin cost(a) rib (see costa) + -o-

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To costo-

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Costo- is always a great word to know.

So is ninnyhammer. Does it mean:

an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

a fool or simpleton; ninny.

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American Heritage

Medical Dictionary

costo- pref.
Rib: costovertebral.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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People who can define Costo- may know 25,133 words, as many as a 8th grader.

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Related Words

cost- costotome

costotome

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