Retia
Acceptable For Game Play - US & UK word lists
This word is acceptable for play in the US & UK dictionaries that are being used in the following games:
The American Heritage® Dictionary of the English Language, 4th Edition
The Century Dictionary and Cyclopedia
Word Usage
"The actual heat exchangers in animals are called retia and are comprised of two layers of blood vessels arteries and veins that flow in opposite directions."
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