What does the term gel mean?

What does the term gel mean? Term gel has multiple meanings depending on context. In chemistry, gel is semi-solid colloidal system where liquid dispersed in solid network, with jelly-like consistency, like gelatin, silica gel, and hair gel, characterized by elastic and viscous properties. In hair care, gel means styling product that holds hair in place, as in hair gel. In medical terms, gel is topical preparation or ultrasound medium. As verb, to gel means to become firm or semi-solid, or figuratively to come together and work well, like ideas gelling or team gelling meaning ideas forming or team working together harmoniously. In slang, gel can mean gelato, or in British slang gel as short for girl. In laboratory, gel refers to matrix used for electrophoresis. So term gel means semi-solid jelly-like substance, or to become firm, or figuratively to come together and be in sync, depending on whether used as noun for substance or verb for process of solidifying or harmonizing.