·noun One who lays slates, or whose occupation is to slate buildings.
II. Slater ·noun Any terrestrial isopod crustacean of the genus Porcellio and allied genera; a sow bug.
·- Any isopod crustacean of the genus Ligia. ...
Webster's Dictionary of the English Language
The Ligia oceanica, a small crustacean. ...
The Sailor's Word-Book