| Pleasure | Max A., U.S. Dentist. See: Pleasure curve. (05 Mar 2000) |
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| Pleasure curve | A curve of occlusion which when viewed in sagittal section conforms to a line that is convex upward except for the last molars. (05 Mar 2000) |
| pleasure principle | A psychoanalytic concept that, in a human's psychic functioning, he/she tends to seek pleasure and avoid pain; a term borrowed by experimental psychology to denote the same tendency of an animal in a learning situation. Synonym: pleasure principle. (05 Mar 2000) |
| pleasure-pain principle | The psychoanalytic concept that man instinctively seeks to avoid pain and discomfort and strives for gratification and pleasure. (12 Dec 1998) |
| pain-pleasure principle | A psychoanalytic concept that, in a human's psychic functioning, he/she tends to seek pleasure and avoid pain; a term borrowed by experimental psychology to denote the same tendency of an animal in a learning situation. Synonym: pleasure principle. (05 Mar 2000) |
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