Source : Webster's Revised Unabridged Dictionary (1913)

Slater \Slat"er\, n.
   One who lays slates, or whose occupation is to slate
   buildings.

Slater \Slat"er\, n. (Zo["o]l.)
   Any terrestrial isopod crustacean of the genus {Porcellio}
   and allied genera; a sow bug.

Source : WordNet®

slater
     n : any of various small terrestrial isopods having a flat
         elliptical segmented body; found in damp habitats [syn: {woodlouse}]