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How well something works under ideal or controlled conditions, like efficacy proven through scientific study.
The system of cells, tissues and organs that regulate our body’s responses to internal and external stimuli.
A term — like homosexual, heterosexual, bisexual, queer, straight, lesbian, gay, asexual — used to describe a person’s usual or current pattern of emotional, romantic and/or sexual attraction to other people as it relates to or is about gender.
A romantic or sexual relationship where no one is communicating clearly to define the relationship.