/ Dictionary / Index R rattlesnake master: Meaning and Definition of Find definitions for: rat'tlesnake mas"ter Pronunciation: [key] any of various plants of the genus Eryngium, esp. E. yuccifolium, having spiny leaves and dense, rounded flower heads. any of several other plants, esp. of the genus Liatris. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rattlesnake fern rattlesnake plantain Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language