/ Dictionary / Index B black shank: Meaning and Definition of Find definitions for: black' shank' Pronunciation: [key] — Plant Pathol. Plant Pathol. a disease of tobacco, characterized by wilting and by decayed, blackened roots and stems, caused by a fungus, Phytophthora parasitica nicotianae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black selenium black sheep Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language