Examples from the Web for rootlet
It sent downward a rootlet to get soil and water, and upward it shot a stem to which the first pair of leaves was attached.Arbor Day Leaves|N.H. Egleston
At last it lit upon a rootlet of the tree quite over her shoulder.The Luck of Roaring Camp and Other Tales|Bret Harte
But how is material conveyed from rootlet to veinlet of leaf hundreds of feet away?Among the Forces|Henry White Warren
Every growing shoot of a great tree is continually describing small ellipses; the tip of every rootlet endeavours to do the same.
No structure in plants appears more wonderful, as Darwin describes it, than the tip of the rootlet of a seedling.