/ Dictionary / Index M Malpighian tube: Meaning and Definition of Find definitions for: Malpigh'ian tube" Pronunciation: [key] one of a group of long, slender excretory tubules at the anterior end of the hindgut in insects and other terrestrial arthropods. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Malpighian layer Malpighian tuft Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language