An antique churn for making butter. The definition of a churn is a device for making butter. An example of a churn is what the Amish use to make butter. To churn is defined as to stir or shake milk or cream with intense movements in the process of making butter, to stir up and agitate, or to produce something at a rapid and regular rate.
Spiders and scorpions are members of one chelicerate group, the arachnids. Scorpions' chelicerae have three sections and are used in feeding. Spiders' chelicerae have two sections and terminate in fangs that are generally venomous, and fold away behind the upper sections while not in use.
Arachnids are a group of arthropods that includes eight-legged creatures such as spiders, ticks, mites, daddy-long-legs, pseudoscorpions, scorpions, and whip scorpions.