t 1 a 1 p 3 r 1 o 1 o 1 t 1
7 letters · 9 points in Scrabble
Meaning
noun (botany) main root of a plant growing straight downward from the stem
noun something that provides an important central source for growth or development
originFrom tap + root. The oldest use (by Philemon Holland) is spaced as tap root. In the 18th and 19th centuries the standard spelling was tap-root.
Etymology from Wiktionary, CC BY-SA 3.0