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archenteron
ar·chen·ter·on [ aar kéntə ròn, aar kéntərən ] (plural ar·chen·ter·ons)


noun 
Definition:
 
embryonic digestive tract: a digestive cavity in animal embryos that develops into the gut
[Late 19th century. < Greek arkhē "beginning"+ enteron "intestine"]

ar·chen·ter·ic [ rkən térrik ] adjective
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