n. 1. (Placename) a republic in West Africa, on the Atlantic: established as the colony of French Guinea in 1890 and became an independent republic in 1958. Official language: French. Religion: Muslim majority and animist.
Definition of ice pack for English Language Learners. : 1  a container or bag filled with ice that is used to cool part of your body. : 2  a large area of ice on the ocean formed from pieces and sheets of ice that have been pushed together by wind and waves.
A hydration pack works by allowing the user to drink water or other liquid without using her hands. They are commonly used by people who spend a lot of time in outdoor activities such as hiking, kayaking, or bicycling.They are also commonly used in the military.Hydration packs are a system for dispensing liquid, built as a waist or back pack, that contains a bladder to hold the liquid, usually made from rubber.Sometimes they are also insulated.hey are also commonly used in the military. Hydration packs are a system for dispensing liquid, built as a waist or back pack, that contains a bladder to hold the liquid, usually made from rubber. Sometimes they are also insulated.