cotton gin 
noun
A machine for separating cotton from its seeds.After harvest, the whole kenaf plant is processed in a fiber separator similar to a cotton gin....
- The focus on textiles takes students from the cotton gin on through to nylon stockings.
- For several hundred years, the great innovations in science, technology and engineering - the wheel, the bellows, the cotton gin - were focused on reducing the amount of backbreaking labor humans must endure.
- keep someone off
- keep someone posted
- keep someone sweet
- keep someone/thing off
- keep someone/thing on
- keep someone under
- keep someone up
- keep something back
- keep something dark
- keep something down
- keep something from
- keep something in
- keep something quiet (or keep quiet about something)
- keep something to oneself
- keep something under one's hat
- keep something up
- keep step
- keep tabs (or a tab) on
- keep the ball rolling
- keep the bastards honest
- keep the field
- keep the peace
- keep the pot boiling
- keep (the) score
- keep the wolf from the door