Glossary P

pH is defined as a measure of the acidity of a solution; calculated as the negative log10 of the [H+] in which 7 is neutral; values that are >7 are basic and <7 are acidic.

Phagocytosis is the process by which Phagocytes ingest and attempt to eliminate a foreign invader; the process of engulfing and killing foreign particles. Moreover, Phagocytosis is a process by which immune cells, such as Macrophages destroy germs or viruses by engulfing them and breaking them down.

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Phallic Stage refers to the third stage in Freud's developmental theory, during which the Oedipal crisis takes place and the superego develops.

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Phalloplasty is defined as a transgender operation in which a penis is artificially constructed.

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Phallus is a term used to refer to the penis as a symbol of power and aggression.

Phantogeusia means experience of a phantom or hallucinatory taste.

In psychology, the term 'phantom' is often used to refer to the experience of sensation or perception in a body part that has been amputated or lost. This phenomenon is known as phantom sensation or phantom limb sensation.

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Phantom limb is defined as the illusory sensation that a limb still exists after it is lost through accident or amputation; the continuing sensation of an amputated body part. Phantom limb, moreover refers to a person’s continued perception of a limb, such as an arm or a leg, even though that limb has been amputated.