noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Several North American plants with black roots of:; genus Pterocaulon, such as Pterocaulon pycnostachyum (dense-spike blackroot) and Pterocaulon virgatum (wand blackroot) countable, uncountable
2. 2
   Several North American plants with black roots of:; species Veronicastrum virginicum (Culver's root) countable, uncountable
3. 3
   Several North American plants with black roots of:; species Aletris farinosa (colicroot) countable, uncountable
4. 4
   Several plant diseases caused by fungi in the genus Aphanomyces causing that cause roots to rot and turn black. countable, uncountable

Etymology

From black + root.

Related phrases

culver's root

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.