D defs.my
Entry 2 senses Webster, 1913

Slade

/slād/ · IPA /sleɪd/
01 n. A little dell or valley; a flat piece of low, moist ground.
  1. 1.
    A little dell or valley; a flat piece of low, moist ground.[Obs.]
  2. 2.
    The sole of a plow.