معنی کلمه :‌ sleetch

Mud or slime, such as that at the bottom of rivers.

An instrument used to illustrate the freezing of water by its own evaporation. The ordinary form consist of two glass bulbs, connected by a tube of the same material, and containing only a quantity of water and its vapor, devoid of air. The water is in one of the bulbs, and freezes when the other is cooled below 32º Fahr.