Definition of Malpighian tubule
: any of a group of long blind vessels opening into the posterior part of the digestive tract in most insects and some other arthropods and functioning primarily as excretory organs
— called also Malpighian tube
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Merriam-Webster unabridged
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Time Traveler for Malpighian tubule
The first known use of Malpighian tubule was in 1877
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