tap root noun phr. & verb. ['tap ru:t] Also (esp. as verb) tap-root. E17.
[from TAP noun¹ + ROOT noun¹.]
A. noun. A straight tapering root, growing directly downwards and forming the centre from which subsidiary rootlets spring. E17.
b. verb intrans. Of a plant: send down a tap root. M18.

■ tap-rooted adjective having a tap root E18.

[TahlilGaran] English Dictionary ▲