OPIOID ANTAGONIST

an agent which acts as an antagonist at opioid receptors. Typically, opioid antagonists are synthetic sub=products of morphine which, as an outcome of structural...

OVERPROTECTION (“Momlsm”)

Every young child needs a great deal of care, attention, and “mothering,” and every older child needs help and guidance in meeting the situations...

ONSET OF ACTION

the place at which the operations of a drug is obvious, typically gauged with regard to the time passed between delivery and the presenting...

OLIGOPHRENIA (literally, “small mentality”)

A term for mental retardation or mental deficiency, more commonly used in Europe than the United States. Until recently the term appeared in the...

OBJECTIVE SET

a gestalt psychology factor wherein the initial grouping observed in a demonstration based upon unbiased aspects, like spatial location, will remain as the demonstration...

ONANISM

Sexual intercourse with withdrawal just before ejaculation; coitus interruptus.The term derives from the Bible (Genesis 38:9): “And Onan knew that the seed should not...

OPIOIDS

a set of mixtures or combined substances which consist of the opiates that manifest naturally and their semisynthetic sub-products, synthetic substances with morphine-like...

ONLY CHILDREN (Onliness)

Attitudes toward the only child are still influenced by the opinions of an earlier day. Among the most frequently quoted statements is one by...

ORAL CHARACTER

In psychoanalytic theory, a pattern of personal traits determined by drives originating in the oral stage of psychosexual development.The oral character stems from the...

OCCASION SETTER

with regard to Pavlovian conditioning, a stimulant which is differentially coupled with a stimulant-stimulant contingency.

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