"taproots" in the noun sense
1. taproot
botany) main root of a plant growing straight downward from the stem
2. taproot
something that provides an important central source for growth or development
"the taproot of his resentment"
"genius and insanity spring from the same taproot"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License