Freebase(0.00 / 0 votes)Rate this definition: Hydroelectricity. Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water.
Definition: Hormones. Hormones. Hormones are chemical substances that act like messenger molecules in the body. After being made in one part of the body, they travel to other parts of the body where they help control how cells and organs do their work. For example, insulin is a hormone that's made by the beta cells in the pancreas.
Define hormone. A chemical (protein, steroid or amine) produced by the endocrine gland that is transported via the blood to the body where it has the ability to effect all the bodily cells or target cells/organs.efine hypothalamus. Part of the brain that links the endocrine system and the nervous system and regulates the pituitary gland whilst regulating basic functions of the body; temperature, water balance, food intake and controls/intigrates the autonomic nervous system.