| ego-ideal | In psychoanalysis, a more or less conscious ideal of personal excellence toward which an individual strives, and that is derived from a composite image of the personal characteristics of a parent, public figure, or one or more other individuals the person admires. The part of the personality that comprises the goals, aspirations, and aims of the self, usually growing out of the emulation of a significant person with whom one has identified. (05 Mar 2000) |
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| ego identity | The ego's sense of its own identity. (05 Mar 2000) |
| ego instincts | Self-preservative needs and self-love, as opposed to object love; drives that are primarily erotic. (05 Mar 2000) |
| ego-syntonic | Acceptable to the aims of the ego and the related psychological needs of the individual (e.g., a delusion); the opposite of ego-dystonic. Origin: ego + G. Syn, together, + tonos, tension (05 Mar 2000) |
| yield strength | The amount of stress at which a permanent (plastic) deformation in a component becomes measurable (usually taken as 0.2% permanent strain). (05 Mar 2000) |
| ultimate strength | The maximum stress achieved prior to failure of a component on a single application of the load. (05 Mar 2000) |
| fatigue strength | The stress level below which a particular component will survive an indefinite number of load cycles (typically about 50% of the ultimate strength of the component). (05 Mar 2000) |